The right is strongly pro-natal. Some of it is for religious reasons, some of it is because they want to control (no, don’t even, the constant talk of male leadership leaves this unquestionable), but a lot of it is that they figure if they out-breed their opponents they’ll win.
Now if you’re talking ethnicity or “race” this is indisputable. Want more whites, or latinos, or whatever, if you breed less than others, that’s going to tell.
But when you’re talking ideology and culture, it isn’t.
The anti-abortion right thinks that out-breeding will work for them, but out-breeding only works if the kids you’re popping up keep your beliefs.