Same thing happened with Italians here in the UK, they were interned in camps and some deported to Canada, some died on a ship on it's way to Canada sunk by a U -Boat,also some German immigrants were targeted, one a famous Butcher in my Town who had lived here for generations his shop was targeted by Morons, that shop was still there when i was growing up making the best pies in Town.

in times of war some people lose the plot including Governments, i believe some Japs in the US actually fought on the side of the US.
The
442nd Infantry Regiment was an
infantry regiment of the
United States Army. The regiment including the
100th Infantry Battalion is best known as the most decorated unit in U.S. military history, and as a fighting unit composed almost entirely of second-generation American soldiers
of Japanese ancestry (
Nisei) who fought in
World War II. Beginning in 1944, the regiment fought primarily in the
European Theatre, in particular
Italy,
southern France, and
Germany. The 442nd Regimental Combat Team (RCT) was organized on March 23, 1943, in response to the War Department's call for volunteers to form the segregated Japanese American army combat unit. More than 12,000 Nisei (second-generation Japanese American) volunteered. Ultimately 2,686 from Hawaii and 1,500 from mainland U.S. internment camps assembled at Camp Shelby, Mississippi in April 1943 for a year of infantry training. Many of the soldiers from the continental U.S. had
families in internment camps while they fought abroad. Meaning to risk everything in order to achieve victory, the unit's motto was "Go For Broke". Before they left Mississippi, the 442nd was given permission to use the slogan it wanted, "Go For Broke," the shooters' cry to "shoot the works."
Created as the
442nd Regimental Combat Team when it was activated 1 February 1943, the unit quickly grew to its fighting complement of about 4,000 men by April 1943, and an eventual total of about 10,000 men served in the combined 100th Infantry Battalion and 442nd RCT. The combined units earned, in less than two years, more than 4,000
Purple Hearts and 4,000
Bronze Star Medals. The unit was awarded seven
Presidential Unit Citations (seven between 1944 and 1946, Twenty-one of its members were awarded the
Medal of Honor. In 2010, Congress approved the granting of the
Congressional Gold Medal to the 442nd Regimental Combat Team and associated units who served during World War II, and in 2012, all surviving members were made chevaliers of the French
Légion d'Honneur for their actions contributing to the
liberation of France and their heroic rescue of the
Lost Battalion.
...
en.wikipedia.org