https://www.usatoday.com/story/news...ing-lgbt-people-2017-survey-shows/1062188001/
you guys are all bigots!
you guys are all bigots!
But seriously...
It likely has to do with all the faux raging. Some people think LGBT should fall on party lines, so just like any other issue when the other side is constantly bashing them in the face with it, they get sick of it and start seeing it negatively.