What do you do when your friends get bashed?

I've just learned that a friend of mine got jumped by some bigots at a gas station the other night... and the pictures look pretty nasty. He's a sweetheart, and his life has been... difficult... and despite that, he's one of the most upbeat and admirable folks I know. I'm really, really upset and currently very angry about this, but I don't know what to do about it. I want to fix my friend, but I know healing doesn't work that way... I want to hurt the people who did this, but I know I can't find them and I would cause more problems if I tried.I'm livid. I've been shot at down here, and that didn't piss me off nearly as much as this does. So what do I do? I need constructive suggestions, because I'm too upset to think of anything useful right now. I want to be strong and active to protect people, I want to prevent this sort of thing from ever happening, but I can't be everywhere and this shit keeps happening.Also, it looks like the police aren't going to do a dang, either. This should be a hate crime, but if the police aren't going to catch the guys, then no one is going to get charged.