OT: The OP got trolled. And this holds true, and may be even *more* true if the troll doesn't recognize they're trolling. What a troll does is insert some offensive or confrontational remark in an otherwise pleasant thread. And they do this primarily for two reasons, I think: (1) to draw attention to themselves; and (2) to enjoy the incoming show as people argue with them and each other.
The hardest part is to ignore them--which is the wisest choice of action. After all, you're having a pleasant time and then you're challenged with some nonsense which, if the troll is clever or merely lucky, strikes at the heart of any insecurities you may have.
Just ignore it; maybe it will go away. See:
Internet Trolls Really Are Horrible People
Narcissistic, Machiavellian, psychopathic, and sadistic
http://www.slate.com/articles/health...ychopathy.html