How do I deal with boys that are jerks?

okay i went out with this boy and he was being a real jerk so i broke up with him. he makes fun of me and says I am ugly and he says hes going to bomb me because I am an iraqi (I am not). then i went out with this other boy and before i went out with him he was saying i was pretty and after he dumped me he started saying i was ugly and leaving me mean picture comments on my myspace. do they still like me? and what should I do?