When someone calls you a racist, sexist, bigot, homophobe because you happen to disagree with them about tax policy or same-sex marriage or abortion, that’s bullying. When someone slanders you because you happen to disagree with them about global warming or the government shutdown, that’s bullying. When someone labels you a bad human being because they disagree with you, they are bullying you. They are attacking your character without justification. That’s nasty. In fact, it makes them nasty.