I agree that tribalistic behavior can be observed, the misogynists within atheism are quite visible, and some "leaders" are less than perfect to say the least. I don't think though that it is particularly useful to take the comparison with organized religion very far. What can one do? Speaking up against these things and trying to be a visible voice against bullying oneself I suppose.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition