My best guess is that something was wrong with her that she hid deep inside until it was let out

Probably. Reminds me a lot of the guys back in HS who would be super women positive and "feminist" when girls were in earshot, but say horrendously awful shit when it was "just us guys"(I wasn't friends with them either, they just thought it was ok to say around guys in general), up to and including rape apologia in at least one instance. All asshole trump supporters now last I knew.

And they wondered why 90% of my friends in HS were girls.