[MENTION=13260]Rasofy[/MENTION] speaks the truth. This is an emotional "argument" (not really, but lets pretend). When/if you respond emotionally they "win" in their eyes because you are giving them what they want, an emotional reaction. I think of this as vampirism myself. Like internet trolls you can "win" by not feeding them emotions, starve them. No immediate gratification though.
On the off chance you feel like doing battle...
1) As you mentioned this is also a "lazy" comment and I find that when you follow up their comment with a request for information and/or an explanation to their thought process THEY are the ones who can get flustered because your request is basically asking them to "work" mentally. "Oh really? How did you arrive at that conclusion? What's the thinking there? Do you mind explaining? (lol, of course they mind!!!)
2) Jujitsu: I take it you don't hate/dislike anything and it's difficult for you to empathize?
3) NO U!: "Yeah just like your hate of X (insert something they hate here) is jealousy" Be sure to snicker for maximum effect. Be ready to rumble.
3a) "Hmmm, I guess that explains why you hate X." (insert something they hate)
4) Good ol' ad hominem: You're just of fan boi of X, I bet you have posters of X in your room (or buy/listen to their product, own their cd, etc.). Be sure to eyeroll when you say this.
5) Sock them in the jaw, they had it coming. Make sure you have a get a way, lest it become a police action.