Because they weren't in the past. And because HN is an international forum for tech geeks; I think social conservatives and Christians are underrepresented in tech; and I am quite certain the kind of social conservatism and "Christianity" that exist in the US doesn't exist in the same proportion, or with the same beliefs, elsewhere. In Europe for instance, so-called "pro-lifers", while they exist, make up a small minority of the public.