Re: why should we be nice towards people who aren't nice to us. I don't think that we "should", but personally, I try to stand by my principles, which means that I try to do what I believe is right even when others are not. That's the whole point. So if you believe in pacifism, you're not supposed to hit someone who's hitting you. If you believe in kindness, you're kind to people like Brent because it's not about them, it's about you. Of course, we're humans and we fail, but the way I see it, that's the general rule.
However, I must say that I think they're approaching Brent's problem wrong. He seems to have a lot of insecurities deep down and I'd be targeting that. In any case, maybe he's too of an asshole to want to be better, not without a major breakdown. And even then, a whole eternity of torture seems a bit excessive: that should be reserved for people like Hitler.
Michael's line about trying to be better was very touching and I think it touched Bad Janet too, as well as the fact that she wasn't turned into a marble.
And omg, Brent's book! It was so horrible, hahaha