Somebody who uses 'Crauts' (it should be 'Krauts', btw) and 'Huns' probably lacks the mental capacity to think two steps ahead, but on the off chance that I'm wrong let me try to explain something anyway:
Us 'Huns' haven't started a war in 68 years, which is about 56 years more than the US can claim.
Well, I would like to think that we actually learned our lesson and are nicer people now, but something like that is hard to prove.
Another reason why we didn't is that the US took a somewhat novel approach after WWII: Instead of beating the defeated enemy to the ground and destroying his economy and so on, the US convinced the other western Allies to help rebuild Germany and help them form a viable democracy.
A beaten and humiliated foe will never stop seeing you as the enemy and the reason for his downfall. The Germans, on the other hand, learned to see the western Allies as (sometimes uneasy) friends.
With the membership in the NATO and the formation of the EU it goes a step further: The military, political and economical interests of Germany and it's former enemies are now intertwined. Starting a war with France or the US would hurt Germany itself more profoundly.
So letting 'the Huns' in the 'front freakin door' is an important part of making sure that we don't start WW3. And 'killing the EU' too might not have the results longterm that you're looking for.
American often complain about anti-Americanism in Europe.
Well, I can't talk about other countries, but I know that's not true for Germany.
We still see the US as a friend. But if a friend does something that you consider stupid or counterproductive or as hurtful for your friendship you will tell him, complain or get a distance for a while until he goes back to being the friend that you like.
That's the phase we're in right now.