I don't think it has anything to do with Twitter or social media in general. I'm not a social media lover, to be sure, but I find Twitter to have a good proportion of thoughtful commentary and genuine cleverness. Partly, its character limit makes arguments a bit like boxing in a phone booth.

I suspect what happened is that Sam Grady is kind of an asshole and reacted badly to the OP because he was tired of hearing about lady issues. When a professional comedian started paying attention to him, he got giddy and sharpened his repartee, then claimed that he was just messing with the OP to get out of looking like quite the asshole he was being.

On the other hand, GOPTeens really is quite deliberately provoking conservatives' reactions for humorous effect. That would suggest that GOPTeens is more of a genuine troll than Sam Grady, but it feels like the other way around is more accurate, and "trolling" is really just acting like an asshole, whether you mean it or not.

Not that it matters much. I'm reminded of reading engineers vainly trying to define the difference between an "engine" and "motor". Stick to wrenches, boys.