in a lot of southern vacation spots, they have two areas - one for Germans, and one for the other guests.

I know scientists who went to do some work in Germany and could not stand the arrogance of the scientists they were working with, who did not have the knowledge or experience of my North American friends but would simply say "We are German, of course we are better scientists".  This, while my friend is a consultant to help them set up their apparatus.

Germans are super defensive and consider that they should be supreme in all aspects of everything.  For example, in my last job, the Germans would tell me that while I knew American movies,  I did not seem to know German movies so well -  maybe because Germans haven't made such a big impact as Americans have on the field!

And on, and on, and on.

They are no longer so military, but their aggressiveness and superiority complex needs to be toned down quite a bit.  They are obnoxious.

I am, of course, speaking in generalities here and not every German fits into this type, but a LOT of them do.