Friends
Okay, that is a bit different. When we turn our emotions off, we don't feel hate. We feel blood lust and that's it. We don't care enough to hate. Katherine is a waste of space anyway, but that's personal bias talking. So wait, these things literally explode or something if they get feelings? That sounds like a design flaw.
That's what happens when you spend 90 years in a coffin. I think we all want to believe we would do the right thing, but it's harder than it looks. Sometimes it's just easier to be quiet and go along with things. And there's always genuine assholes in any group.