Both liberals and conservatives can look at the same set of facts and draw the exact opposite conclusions. If we ever get our clock cleaned in a war due to our PC policies (including putting women in combat), expect liberals to argue that we lost for reasons of: gender bias, white privilege, class inequity, yada, yada, yada.....
In short, they will never admit they made a fatal error in judgement.
I believe they realize this is a terrible decision. I think they do it because they want America to fail. The equality line is just the words they use to get away with it.