"America has been the best country on earth for black folks. It was here that 600,000 black people, brought from Africa in slave ships, grew into a community of 40 million, were introduced to Christian salvation, and reached the greatest levels of freedom and prosperity blacks have ever known."Boy, that's an incredible insult even for you, Pat!
Putting aside the whole concept of intent (apparently he thinks that "cheap labor" was a minor concern of slave owners compared to converting them to Jesus), there's honestly no telling where Africans would be right now without slavery. In the end, this little theory of oppression-as-tough-love comes a lot closer to "No Israel without Hitler" than "A Boy Named Sue".
In other words, Pat, put a sock in it.