Bumper stickers on a car from Missouri

[ribrepin]

I live in the outer reaches of the Seattle area. We have a lot of libertarian around here, but I saw something today that made my jaw drop. A car from Missouri had two bumper stickers. One said "Abortion-The Supreme court also said slavery is Legal." The second one said "Tolerance-is just another word for no moral values."
I don't remember the exact wording, but this is the gist of the bumper stickers.

Two questions--did the Supreme court ever rule that slavery is legal? I've racked my brain and can't remember learning about that one. My second question is--my husband's company is moving some of their people to Kansas. Are these types of bumper stickers common in the Midwest or is this guy some nut?

I'm used to the "Thank you President Bush" stickers, but I was really stupefied by these. Maybe I live in a bubble around here. I sure hope my husband doesn't get transferred to Kansas.