I haven't been to Berlin in about 20 years, but my observation is what you are describing could be any urban area in the US too... lots of career transplants wh

I haven't been to Berlin in about 20 years, but my observation is what you are describing could be any urban area in the US too... lots of career transplants who want to keep to themselves, don't really see themselves as locals, may only be there for a few years until they can make their next career move, etc. It's an interesting phenomenon to observe.