People who make shitty public statements mocking large social groups (in this case women) probably shouldn't be surprised if (more than just) members of those social groups don't really want to work with them. Or that others who don't share those views don't want to be publicly associated with them.

In particular, he made a bunch of statements which would make me concerned about him being in any sort of managerial role over women. He doesn't seem to have tried to walk them back or show some sort of change of heart (or "c'mon guys, it was all just a bit"), so I think his almost-coworkers had a point when they started that petition against him.