Being invaded and occupied by americans, during and after WWII. The nazis were at least europeans, and everybody knew what to expect. Americans were, and are, much worse. The presence of americans in Europe, until this day, is our greatest tragedy.

I think most Europeans prefer the 'American occupation' instead of the Nazis. At least they did, when they greeted the entrance of the US to the ww2. As for your argument, why the US are unpredictable? They are not, but even if they were, why the predictable is always better than the unpredictable?

Since the US government did not build concentration camps in Europe, all the evil you may see in their influence, is just that: an influence, which means that Europeans are responsible if they accept those elements - they want them, and they get them.

Now, if Nazis are indeed Europeans, then Europe appears to have enough evil in itself and by itself - it doesn't need to import evil from the US! Or, perhaps, we should say in such a case, that we are most likely to export our evil to the US, that the opposite, so that in our relationship the US are in a greatest danger than we are.