{list 3 reasons}though the american government feared that japanese americans would possibly become saboteurs they were not justified for interning them because

Japanese Americans were AMERICANS. They were citizens of this country. We presume innocence until proven guilty here. They were not tried and found guilty. They were simply rounded up on the basis of their ethnicity.

German Americans were not interred, but they were of European descent not Asian. To imprison the Asians but not the Europeans who could possibly be friendly to the enemy was racist.

Japanese Americans were trusted to serve in the US armed forces as did German Americans. Many served honorably fighting against possible relatives and family friends. If they could not be trusted, they shouldn't have been allowed to defend the nation in the armed forces.