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Now we're getting somewhere. That, I think, is comparable, apart from one thing: once in control, most killing stopped, as opposed to what the Germans did in WWII: once in control, the killing started.

And it still is silly to compare those atrocities to the Japanese internment, or state that it is "what most people in power would do", or comparable to the behaviour of "all governments".

enough with your mantra of control vs continuing.

Here.

https://en.wikipedia.org/wiki/Allied_war_crimes_during_World_War_II

Planned extermination of entire nations doesn't compare well to incidents like those mentioned on that wiki page. I don't think it compares at all. While you have some good points in your post, there is a question of scale, motivation, purpose... You are talking about the world not being black and white. Yes, there may be only shades of gray, but they do range from, say, close to white to almost black. Hitler, Stalin, Mao, they are close to black. Who, of the leaders of Europe today, can be compared to them?
And about extermination of entire tribes in Africa/America - these are real and horrible crimes too, no doubt. Leaders guilty of making/letting them happen are as guilty as Hitler, and they do deserve to be considered vicious and evil - which is the opposite thing to calling Hitler "just another leader". All evil leaders are leaders, not all leaders are evil leaders. What Hitler did was specific to him. Would, say, Hollande do the same? I doubt it.

that's not "intentional killing" according to him. is "collateral damage"

You read as sloppily as you write.