That's quite a broad brush to paint with. And even if it were true, which it's not, that's not an excuse to 180 from "hate hate hate abortion" to defending it. Another person's lack of sincerity in their convictions shouldn't sway you.
I got caught up in the Bernie bro shit. Yeah. That was really my introduction into politics. Then I learned more and adjusted how I view politics. But good luck finding a thing I've expressed hatred for over several years that I've expressed is core to my faith. Then subsequently defended and excused that thing.