The US absolutely had a purposeful genocide of native americans, and directly implemented prison camps and some property confiscation of japanese immigrants and citizens.
This is explicitly not a support of the parent's comment. The US was not great, and even had explicit segregation, but was not trying to spread it's own abysmal ideals to all of europe. Hitler was clearly trying to spread facism through all of europe, and eventually the world. His desire to do so was broadly popular in Nazi Germany, so the country's people were never going to stop him. Going to war to grind Nazi Germany into the dust was the only option. It is justified. We also didn't preempt anything. We sacrificed two sovereign countries hoping to avoid that war, which should be clearly not acceptable.
This is explicitly not a support of the parent's comment. The US was not great, and even had explicit segregation, but was not trying to spread it's own abysmal ideals to all of europe. Hitler was clearly trying to spread facism through all of europe, and eventually the world. His desire to do so was broadly popular in Nazi Germany, so the country's people were never going to stop him. Going to war to grind Nazi Germany into the dust was the only option. It is justified. We also didn't preempt anything. We sacrificed two sovereign countries hoping to avoid that war, which should be clearly not acceptable.