Germany isn't actually behaving like 1930s Germany - it's behaving like 1920s France.

I presume you have read Keynes' The Economic Consequences of the Peace. He makes a strong case that it was the actions of France, from the end of WW I through the 20s, based on Clemenceau's policy and goal of preventing Germany from being able again to become much stronger than France, that largely created the conditions that gave rise to the collapse of the Wiemar Republic. Of course I have been assured that Germany's current behavior is in no way related to that sad history, but it would seem to be at least a possible example of doing unto others as others have done unto you, though I am sure that this has never even crossed the minds of any current German officials. I hope.

"It is not necessary to have hope in order to persevere."