All the more so, since our society often regards law as equal to morality. Besides, babies are dying every day. I don't see how this is arguable from a Christian standpoint. We're not asking them to become Christians in the case of abortion, just to rise to the level of civilization and the most rudimentary, obvious natural moral law. If someone wouldn't squirm at that point then they are an inhuman monster, as far as I'm concerned.
People know murder is wrong.
You don't have to be a Christian to know that. All societies in all periods have condemned murder. They just selectively and hypocritically apply the prohibition in most cases, as we do now with the class of the preborn human beings. We simply define them down as sub-human and barbarously and mercilessly slaughter them. No one is saying it would be a cure-all.