This is mainstream Republican thought. Why is anybody surprised? It is those in the party who would disagree with these statements who are in the minority.
Do you believe "They must prey on our children to increase their numbers" is representative of mainstream Republican thought? Perhaps in some parts of the south and midwest, maybe, but not overall.
You're forgetting that the South has the most Republicans of any region of the country at this point. This is as mainstream as it gets. Those who pull the purse strings (Koch and Co.) probably don't view gays this way, but the junior partners in the coalition certainly do. The plutocratic wing of the GOP is desperately trying to make the populist wing of the party shut up about these issues and let them keep making money but the populist wing won't have it, if insane rantings like these have anything to say about it.
And yes, without a doubt, majority Republican opinion is this kind of thought. That's what it means to be a Republican in 2013 - to be a bully attacking anyone you don't like and acting like a 14 year old on the national stage when you don't get your way.
