I'm going to revisit this topic. Another form of religious 'bullyism' is a kind of misguided evangelism. As I wrote the purpose of bullying is to tear down the victim so the bully can feel better. A lot of people think they are 'evangelizing' when in reality they are being bullies.
Fundamentally, for most of these people, it's about finding 'vindication' in their faith. If they can convince others to join (or "save" them) then they feel better about their choice.
You can tell a bully "evangelist" by the fact that he/she becomes angry when the victim doesn't agree, e.g. "I've told you the truth and you didn't immediately agree so there must be something wrong with you."
Seen that...more times then I can recall. Deep Sigh. There's a feeling of "The more people who agree with me, the more it is proved that *I* am right." It's numbers, not real people, istm. And a streak of Pride, maybe.
Frankly, being looked on as one more notch in someone's belt doesn't make me want to join up.
I regret that I have seen such attitudes with both RC and EO.
But it happens in religion and politics and social things and music or other person likes or dislikes.... Very Human.