Yes. It seems pretty clear from history that the South turned Republican largely because of the civil rights issue--because the Democratic party (nationally), including their leader LBJ, was supporting civil rights.
I will not try to parapphrase it, but htere is a great story of his meeting with George Wallace in the Whitehouse, when Wallace was defting a court order and refusing to intergrate.
Want proof, just check out Senators leaving the party, Senators retiring, and the last election.
I am 49, bald, ugly, and don't own a single cool thing. Kids like me though.
According to your way of thinking there have been a lot of landslides over the years. There was still 58 million people who voted against Obama, that is a lot of people.
Kind of cool to look at actually.