So, you are saying the USA had the firm intention to kill all Japanese internees? Because that is what it would take to make the two comparable.
Nowhere do I say that the means justify the end (sic), or the other way around, for that matter.
Hitler didn't "choose a path with no respect for human life", he intentionally killed millions. That is a different thing.
"almost all leaders"? No, a small minority of leaders, especially when talking about the 20th century, intentionally went out there to kill millions because of race, religion or politics.
I have no links to give you; the sources and literature I use take up 6 meters of my library wall.
Dude, they dropped 2 nuclear bombs. They treated them like trash. Everyone hated the Japanese much like they hated commies. Just the shallow evidence is overwhelming.
Here is a short link to remind you are "intentionally killing"
here is some more reading to add to your research:
https://www.darkmoon.me/2015/the-untold-story-of-american-war-crimes-in-japan-part-1/