I've had a similar problem when teaching. The Republicans in the US used to be a political party. I never agreed with them much, but that's okay. Now that they support torture and have become a shakedown organization disguised as a party, I have, shall we say, "issues" with them. So what do I do, as a teacher, when I find out that a student is spouting brainless Republican nonsense? What I did in actual fact was try very hard not to know. If I did know, despite my best efforts, it became really difficult to evaluate their work objectively. I mean, if you're convinced that someone's a bleeding idiot, it's very hard not to approach their work with a more critical eye. Then I'd have to put in all kinds of extra effort to make sure I wasn't being unfair. And that would annoy me even more, because I was spending all that effort on someone who wouldn't know justice if it bit them in the behind. Then I'd have to work even harder at staying objective. Then ... and so on. There weren't any good options except not to know in the first place. Not for me, at least.