We don’t need their word for it… they recorded everything they did.

My point is individual Germans. If an individual German said "oh we didn't know about the camps", you might believe them. Maybe. Perhaps a kid, at least? But if you liberated a camp in their city, probably not, since it was in their city.

It doesn't matter what they knew. They knew something horrible was happening and wanted to ignore it, which is almost as bad as being directly part of it.

simply changing the variables that led young Hitler down the road.

Well doing that would also require for you to know what exactly led to that. It's probably not as simple as you or Family Guy made it out to be. But yeah, so then essentially choosing to remain there to try and make Hitler a better person. Like at the least, preventing his service would mean that you'd either have to disable him in some way or convince him to become a deserter, since they weren't enlisting but were conscripted. Or you'd have to know enough about art to make Hitler a better artist. And as far as paintings go, I don't think I have the same level of skill he did.

Oh yeah 1932 Hitler you'd just shoot in the face. But even then, you wouldn't be able to know for certain that that would only have good effects. Perhaps if we lived in 1950's Europe, it would be quite a lot clearer and less risky, but due to the whole butterfly effect thing, (and this is getting more into the metaphysical than political) you wouldn't even know if you'd exist in the world that would happen. Or perhaps it's a oneway timemachine, and then that worry wouldn't exist. It just really depends on which movie we use for the time-travel rules, really, lol.

If we dial it back from time machines and shooting Hitler in the face to just agreeing to punch fascists in the present?