I've always felt that was how Paul believed. He thinks marriage is between a man and a woman but doesn't think the government should be involved in defining it.
"I believe marriage is between a man and a woman. I am not in favor of gay marriage."
is exactly what Obama "believed" in 2008.
The states-as-testing-grounds concept has always felt pretty reasonable. Some will make objectively bad choices, but the right choices will eventually will themselves out.
The folks fighting for gay rights had to go state-to-state because there was no traction in federal legislature to get changes made.
Follow up: http://www.politico.com/story/2015/06/rand-paul-comments-gay...