If France and Britain hadn't been such assholes after WWI, I doubt that the Nazis would ever have taken over.

The Nazis actually did a good job getting Germany functional again. That doesn't excuse in any way all the horrible stuff that they later did. But it does explain how they took over.

Watch "Triumph of the Will" sometime, from the perspective of people who had spent over a decade after WWI starving.

It's all just cycle of hate. Just how the abused grow up to be abusers. But on a hugely larger scale.