Absolutely not true, it means you might e.g. be living in Berlin, or in Germany or Netherlands in general. Not everywhere people are nice and in some places they place a particular pride in being assholes.
Obviously one can imagine legitimate exceptions to any saying, but in your particular examples I think what you're describing is just legitimate differences in cultural norms. I would argue that if the prevailing culture is a certain way, then someone who carpet bags in and judges people to be assholes based on a foreign rubric is in fact an asshole.
