You can't possibly believe this is actually true. You think the South isn't any more homophobic than, say, the west coast? Really?
Here's some data, the first % is "Homosexuality should be accepted", the second is "Homosexuality should be discouraged": http://www.pewforum.org/religious-landscape-study/compare/vi...
First, a few states from the deep South:
Alabama - 41% :: 52%
Arkansas - 45% :: 47%
Georgia - 55% :: 38%
Mississippi - 40% :: 54%
South Carolina - 51% :: 42%
Now the west coast:
California - 69% :: 24%
Oregon - 66% :: 25%
Washington - 69% :: 27%
I lived in Alabama for a couple years. People are definitely more socially conservative there, and that does lend itself to homophobia. Not everyone who's a social conservative, of course, but it's definitely much more common than with social liberals.
I've also personally seen a friend assaulted with a brick on school grounds, on camera for being gay. The school and police refused to do anything against the assaulter.
I left Atlanta for a reason, and haven't looked back.
EDIT: would love to know why examples of institutional racism and homophobia in the south would be downvoted.
Do me a favor, go through this list and tell me what every single state with an acceptance rate below 50% has in common: http://www.pewforum.org/religious-landscape-study/compare/vi...
Meanwhile, the numbers for the NE and the western states are dramatically higher...