Revisionism is about correcting misrepresentations and outright falsifications of history.
One way of falsifying history consists in presenting essentially identical facts differently. For example, what is reported as a war crime by an adversary is excused as a defensive measure when committed by the own troops.

One of the most obvious examples are the so-called "concentration camps", mostly presented as a German invention, conveniently forgetting that such camps were established by the democratic (and less democratic) luminaries before, during and after Nazism.

Revisionism is not about moral condemnation. If a total war justifies incarceration of innocents, is not a revisionist consideration.

Roosevelt's "Relocation Camps"

for Americans of Japanese Ancestry

Fernando Ortíz Samudio (CTR)

The facts: 112.000 ethnic Japanese deported to camps

"The very fact that no sabotage has taken place to date is a disturbing and confirming indication that such action will be taken"

(Memorandum to Secretary of War, 13 FEB 1942, probably by Gen. John L. DeWitt)

At the time of Pearl Harbor, about 127,000 Japanese-Americans lived in the United States, most on the West Coast. After the US entry in WWII, American residents of "Japanese ancestry" were considered "enemy aliens" - sort of 5th column - loyal to their ethnic origin and not to the country they lived in.
This strong anti-Japanism was not based on facts - acts of espionage or sabotage - but on the ethnic origin, i.e. race.

On February 19, 1942 President Roosevelt signed order no. 9066 and on March 18 order no. 9102 allowing the military to identify, limiting their movements and deporting them from the West Coast (where 90% of them lived), without charge, hearing or trial. About 112 000 to 120.000 persons of Japanese descent, 2/3 of them US citizen, were deported to inland camps, guarded by barbed wire, inspection towers and armed guards. This was about 90% of the 127.000 estimated People of Japanese ancestry living in the US.

The whole 'relocation' system consisted of ten camps. Proud director of the American concentration camps was (from March 1942) Eisenhower's youngest brother, Milton.

Only one day after Pearl Harbor, bank accounts of Japanese Americans were frozen, driving most of their owners in ruinous sales and bankruptcy. The material losses of the Japanese community were estimated at over $400 million (farms businesses, personal property). According to the TIME [1], after the war approximately 10% of these losses were settled.

The deportation

Deporting aliens of "Japanese ancestry"
to Roosevelt's concentration camps

The official reason for the deportation was fear of Japanese invasion on the West coast, but the Japanese Americans living in Hawaii (38%!) were not deported, which makes this argumentation inconsistent.
The Japanese Americans were given a few days only to prepare for internment. They were only allowed to take with them what they could carry. Many sold their belongings hastily before deportation.

The destination camps were not chosen arbitrarily: The 'Tule Lake War Relocation Center', for example, was 'one of the largest and most controversial', reserved for special people, not forswearing enough any form of allegiance to the Japanese Emperor in the questionnaire or otherwise disobeying orders or protesting against internment.

Conditions in the Concentration Camps

Mansanar concentration camp

"Barbed wire fences with watch towers and armed guards and searchlights surround an area a mile square set in the middle of a swamp. The barracks are merely bunkrooms.
Life in the Internment Camps

Unsanitary, squalid living conditions, inadequate medical care, poor food, and unsafe working conditions had prompted protests at several camps. In November 1943 a series of meetings and protests over poor living conditions at Tule Lake prompted the Army to impose martial law over the camp.
see www.tulelake.org

"...in the frigid camps of Wyoming and Idaho, the only protection against the winter cold consisted of antique pot-bellied stoves" TIME Magazine Aug. 11th, 1961.

No Names only numbers

No 'Jew stars', only 'Jap tags':
Deported 'aliens' with their numbers

Tags with numbers were issued to every family to tie to luggage and coats -- no names, only numbers.
"From then on," wrote one woman, "we were known as family #10710."

from (11) Life in the Internment Camps, 1999c (836)

Forced Labour paid at ridiculous wages

Work in Roosevelt's
concentration camps:
planting celery in Tule lake
from Wiki Tule_Lake

The internees were put to work in the camps, wages being paid at prison tariffs.
Unskilled worker were paid $8 per month. The maximum (doctors, dentists) was $19 per month. At that time this was what free Americans earned per day[2].

Working one month for what others earn par day is normally called slave labor.

The obvious comparison:
Rooseveltian and Hitlerian concentration camps

Now comes the interesting point: How the treatment of Americans of Japanese ancestry differs from the treatment of Germans of Jewish ancestry ?

Before entering the subject, it is interesting to note how precisely this comparison is avoided, even by web pages admitting the anti-constitutional nature of the 'internments'. Most texts/museums insist in not calling them concentration camps. Although Roosevelt and Eisenhower themselves called the camps 'concentration camps'.

The following table tries to compare both point by point:

#	comparison item	American concentration camps for ethnic Japanese	German concentration camps for ethnic Jews
1	camp designation	relocation centers internment camps segregation centers concentration camps[3]	concentration camps
2	circumstances	WWII[4] US at war with Japan; Pearl Harbour attack	WWII internat. Jewry declared war to Germany since 1933 Jews in support of allied powers
3	reason for internment	considered enemy aliens	considered enemy aliens
4	deportation based on	race, not individual guilt	race, not individual guilt
5	basis for rounding-up	fear of sabotage	partisan warfare ('resistance' in France), Jew control of communism, sabotage,need of workforce
6	previous negative experience with 'aliens'	none	behavior in WWI (Balfour, Versailles); Weimar republic; role of Jews in communist revolutions (Germany, Soviet Union)
7	no. of deported	112.000-120.000	purportedly several million
8	deported % of 'aliens'	90%-95% according to sources	less[5]
9	life in camps	primitive barracks, not adapted to climate; no work for war effort but for own subsistence; self-organization payment: low (prisoner wages)	barracks adapted to climate; work for war effort required; except for work load: self-organization; payment: low (prisoner wages)
10	mistreatment	few reports Tule Lake, Mansanar	many reports (Mengele, lampshades,...); some discredited, other difficult to verify
11	mortality	low	high death rate due to epidemics and lack of medicine in the final break down
12	post war indemnification	very low (estimated 10%)	very high

The basic point remains the same in both cases:

A well identifiable ethnic group is singled out in wartime and put into camps, because their brethren operate on the enemy's side.

So what are the differences between Hitlers and Roosevelt's concentration camps?

The essential differences are
-neither in the intentions
(isolating and putting to work an ethnic group perceived as enemies during war)
-nor in the scale,
at least in percentage (the US deported nearly 100% of the Japanese under her control)
-nor in the type of internment camps
(barbed wired surrounded barracks guarded by armed guards)

The essential difference lies in the course and outcome of the conflict which produced high mortality rates in German camps:

Typhus imported from the east
The eastern camps were permanently fighting typhus epidemics, which led to the construction of crematoria
Supply line breakdown
The German concentration camp system broke down in the very last months, as it ultimately became part of the war zone which affected supply lines in Germany in general and to the camps in particular.

It were these spectacular mortality rates at the end of the war and the corresponding images of emaciated and dead corpses (along with the crematoria) that were used by allied propaganda to make German concentration camps a singular crime.

... and their own camps a defensive measure, crusading for democracy.

Notes

[1]	TIME Magazine, Feb. 17th 1967, cited by [4]
[2]	"The Rooseveltian Concentration Camps for Japanese Americans, 1942-46" Austin J. App, PhD, Boniface Press,, Phila, Pa. 19144, 15. Sept 1967
[3]	TIME Magazine, May, 12th 1967, called them 'semi-concentration camps'
[4]	In peacetime (1933-1939), German Jews have been encouraged to emigrate, They have not been put in concentration camps for being Jews (however, some of them for communists activities or otherwise opposing the government). At the beginning of the war, this didn't change until about 1942
[5]	The total number of Jews in German occupied Europe during WWII, is difficult to discuss, since even the highest estimates invalidate the sacrosanct 6 million number. Reasonable estimates vary from 3 to 5 million Jews ever being under German control, including all occupied and allied countries. In any case, only a fraction of these were deported, so the percentage of Jewish camp inmates remains far below the 90% Japanese Americans incarcerated in US concentration camps.