Intelligence has may sides. In my opinion, one of them is being able to handle people. Offending people is rarely a clever thing to do. I'm not talking about criticism here, I'm talking about offending people. Even if someone's super-intelligent in terms of science, being rude to people means that he or she has never managed to learn how to interact with people.

This is an incredibly important skill; I've found that it's a lot easier to enjoy life if people like you or at least don't dislike you.