Ah, you need to treat these things as a learning experience. I can think of plenty circumstances in the past where I've overreacted unnecessarily - there's just no telling what would make someone react in this way.

And there's always some aspects of cultural differences that people find difficult to cope with. I can think of a couple dozen examples where I'm never entirely comfortable. Do I cope with it? Yes, it's fine, I remind myself what it is and make myself get over it. Would I find it so easy if I hadn't been used to doing so for a long time? I doubt it.

The key thing is attitude. An open mind is broadened by travel; a closed mind narrowed.