Japanese were interned in WW2 not WW1. German & Austria-Hungarian citizens were interned in WW1. German & Italian citizens were interned in WW2. It is a common international practice to intern the citizens of enemy nations during times of war.
The real question was if American citizens of Japanese ancestry (or Japanese citizens with US 'Green Cards') should be interned by the American government because of the threat of disloyality.
The US government believed that the Japanese-American population was more likely to be disloyal than the German-American or Italian-American population. Also these others were much too large to intern.
The Germans, Italians and Japanese
Unlike the first World War, there was very little antagonism against German and Italian Americans. No Germans or Italians were forced to leave their homes and businesses to be interred in concentration camps like the Japanese were. Black people were still segregated in the armed forces and , in reality, in most areas of daily life in the U.S. Hispanics were allowed to serve with white troops, while blacks were not.
The Germans
Germans...I think.
YES..................
The Germans, Italians and Japanese
It would be the Germans and Italians along with the Japanese.
Germans, Belgians, Italians, Brits
Germans and Italians in Africa during operation torch
germans and japanese
Unlike the first World War, there was very little antagonism against German and Italian Americans. No Germans or Italians were forced to leave their homes and businesses to be interred in concentration camps like the Japanese were. Black people were still segregated in the armed forces and , in reality, in most areas of daily life in the U.S. Hispanics were allowed to serve with white troops, while blacks were not.
The Germans
They fought the Nazis, Japanese, and Italians.
Many northern African countries were invaded by the Germans and Italians. Ethiopia is a good example, it was hit down hard by the Italians.
Germans...I think.
YES..................
Actually, several. The most commonly referred to as being interred would have been Japanese Americans during WWII. Some Germans were detained during WWI and WWII. And, lest we forget, the Native Americans have been held on reservations for about 150 years--the term "concentration camp" generally refers to the relocation and death camps of Nazi Germany during WWII; Hitler actually borrowed the American idea of NA reservations, and actually called the first camps reservations when they were first opened.