Although you'd think they would on some issues. Maybe they think the word slut and prostitute are OK for women who actually have sex without being married or they despise women who don't go to church or aren't morally upright.
I know plenty of women who love to criticize other women in all kinds of things, from the way they dress to the way they talk or act or parent, or any number of things. I also know women who always want to please whatever man is around, whether it's their husband or their boss or the kids' high school coach. I also know women who feel they are failures unless they have a man around. And I also know women who are very competitive with other women about getting their man and keeping him.
It's not so odd to know women like this and realize they care much more about their social position than anything they may have in common with other women. It may be as simple as they have what they want so issues other women may have aren't of importance to them.