But no one hates every other Abrhamic religion more than the leader of one them.

Wow. I’m an atheist and even I know that religious leaders tend to be extremely respectful of other faiths. They respect the holding of faith, even if it’s not the one that they personally hold. They’ve spent their lives studying their religion and often find the history and relationships between different faiths fascinating.

Personally I think they’re just studying myths, and it’s no more productive than somebody studying Milton.