Look up the concept of a "preference cascade," and you will see why the Dems and the media (...but I repeat myself...) are trying so hard to quash the LGB thing.
If you can make those who disagree or protest against you believe that their stance is fringe, shameful, and unpopular, then you will convince them to keep quiet EVEN IF they are the majority. But once people come to realize that they are not alone, are not marginal, then that control erodes. Once they realize they are the majority, that control is gone.