That person was an ignorant, small minded asshole. I'm sorry, and you really didn't deserve that.
And there are so many different people in the MCRmy, some of them, I think, really represent what MCR is about, and are good people. Others are the kind of people who I - to quote Gerard - would 'smash their face in for 6 $ and a Dr. Pepper.' No fuck that, I'd do it for free. But you can't let what they say get to you, because they aren't worth the pain that they will cause if you let them.