Well, the guy claims to be a Christian, though it does seem like the pick and choose variety.
Tho I can't speak for the poster, I got the impression that the goal here was to try to get some of the Christian right to vote "pragmatically" instead of on principles. By accepting late term abortions, he's taken minority position. By accepting it being a civil rights, federal issue, I think he's taking another minority position.
While I would love to see legal abortion beyond saving the life of the mother made illegal, I doubt that will become the law of the land during my lifetime, so for now, I'll take some incremental ism. After making most late term abortions illegal (life of mother exception), send the rest back to the states.