Atlas pro-lifers are way nastier about it than pro-lifers I know in other contexts. I'm not sure if this is because of selection bias in my offline life, the fact that Atlas is so overwhelmingly male, the fact that I live in Massachusetts, or some combination of the three.
I'd wager that the average pro-life activist would tend to have even nastier views on the matter. The average person who votes "no in most cases" in a poll probably not, though. From what I've seen, most Americans tend to fall somewhere on the spectrum rather than having clear-cut views.
Pro-life activists are often involved in helping out pregnant and single mothers directly or indirectly through the work of crisis pregnancy centers. Thus they tend not to fall so easy into villianizing those who have abortions as some generic right-wingers who have less direct experience with the issue.
(of course this depends on how one defines "activist")
