politicsish?
Something I've noticed about a lot of people, especially but not exclusively the more bigoted sort: they seem unwilling to even consider the fact that people who aren't on the same side as them are acting in good faith.
Most people, no matter what ideology they have, do what they do because they think it's the right thing to do. They may be wrong, but the majority of people aren't evil.
Most ideologies have an element in them of wanting to get other people on your side, wanting to get others to share your ideology. This isn't inherently a bad thing! But it is a dangerous thing, as even the people who are wrong feel the need to convince other people to share their ideology, no matter how wrong it may be.