Sometimes the hatred for women that shines through in their posts make it quite obvious that they have "issues". Those men are pretty creepy and best avoided.

For others, I think they relish the chance to be an internet troll so they can beat up on whomever they can get away with beating. They can't really pick on people of color, nor LGBT, as that would not be tolerated here. But the owners have made it abundantly clear that beating up on women (metaphorically, or course) is A-OK, so that's their target.

You can call that a lack of civility if you choose. I think it's far more malignant than that.