The outright stupidity of characters is just surprising sometimes, maybe you should stop and think about why a monster doesn't seem to be intent on killing you instead of antagonizing them.
That said, idiots and fools hide behind religion for their lack of critical thinking and tolerance. There's an old saying that says, "for a good person to do evil deeds, that takes religion." And these idiots are just displaying how evil people hide behind religion to justify their own bigotry. I don't think there's a genuinely good person among this lot, and if there is then chances are that person is so caught up in religious fervor it stopped mattering ages ago.