This makes me think of my response to something that's been happening in the news in my country. I won't bore you with the details but basically it's major scandal about how a large company screwed up and put its customers in danger (as well as the entire national economy). The uproar has been so emotive, and every time I hear about it or someone comments on it, I get strangely edgy. My mum goes on rants about how terribly the company behaved. She asks me about what I think and looks for me to demonstrate agreement (you know, relating to basic ethical stuff: that deceiving people is bad, that companies need to take safety seriously etc) but I can't answer; all I want to do is get out of talking about it. Yes, the situation is bad, and yes, they've done something wrong, but I just can't engage in the debate. In fact, I almost want to isolate myself from the debate. It's not that I don't care, but I just can't handle hearing all the emotive statements and speculation. In conversations about it, I just try to get away with making vague, non-committal replies, or saying that I don't know all the facts yet etc - but I don't think it's really about facts at all. I suppose, when I think of it, for me it's like I'm being told how to feel, before I've decided for myself. That just makes me desperately want to back away.
And BTW, I agree with you on the doorslamming thing too.