Bad / Hostile
intolerant - Refusing to allow others to do or believe things that you don't agree with.

When people try to dialog with others, and both are intolerant of each others' points of view, it often just degenerates into a shouting match, with neither side listening.
shun - To persistently avoid, ignore, or reject (someone or something) through antipathy or caution

When David tried to join in the conversation at the club, they ignored him, and he suspected that he was being shunned because he had a different religion than they did.