Being jerks when disagreeing is what I'm talking about.

[Mostly, anyway.]

I don't care if people disagree; I mean, it's frustrating, especially since I'm not usually arguing about something I think I'm wrong about, but people are allowed to disagree. It's just that it goes into some sort of personal jab so often.

[So often that some of the insults and insinuations are ones he's been afraid might actually be true, even if he doesn't feel like they are.]

I think that's why people feel the need to step in, too.