ity should be banned?

that is what a gang of people shouted to my mate the other night and then they jumped him. why? because he is gay. too bad i wasn't there at the time I would have gave them a piece of my mind and made sure they couldn't move the next day. I mean why do people do this? what do they hope to gain with being racist and discrimitive except for a bad rep? I asked this before but thought I'd get you lots opinion. Have you ever been in this situation? x