Livre d'Or

It wouldn't make sense to expect someone to start believing in God because an atheist committed an atrocity!

That's actually really interesting. Obviously I wouldn't expect that, but I think there are people who say things like "I don't believe in God, but I'm not one of those atheists" where they endorse the dictionary definition, but they associate atheism with a whole lot of stuff they don't like (smugness, sexism, islamophobia, etc -- rampant in at least some segments of the atheism community, although I hope we can have atheism without any of that!)

But where is the line? I think of religion as primarily a cultural choice, but other people don't -- some Christians would presumably say that it's just true that the God of the bible exists, and however evil other supposed Christians may be, that can't change the fact of God's existence.

And it's normally accepted that if you're British, but Britain does horrible things, it's acceptable to stay and try to prevent them if you can, rather than emigrating being the only moral option.

And even for groups which are voluntary, I'm not at all sure where the dividing line between "we need to fix this" and "this is irredeemable, we need to get out" is -- it's probably useful for people to have different lines. For instance, it seems likely there's no hope of redeeming scientology: it would be nice if people could, but I think the bad things are so pervasive, the chance of maintaining the organisation without them is negligible. But obviously, I don't think that applies to Islam.