Indiana has recently passed a bill into law (though there are other red-states doing the same thing) where businesses and individuals could cite religious freedom to discriminate against others which would most likely be those in the LGBT community. Governor Mike Pence said the bill wasn't about discrimination, which I see as a politically correct lie as all these bills are obviously the social-conservative revenge for court rulings in favor of marriage equality.
Many say that they are against LGBT individuals/marriage equality because of their faith in Christianity. With many Christians and religious branches coming out in favor of equal rights, perhaps it's not about religion. It's been very common for people to be homophobic throughout the ages, and to use religion to justify their hatred. Just like the pastor that told my brother and his future-bride that he wouldn't marry them because they were of two different races and that was against his religious views. Just like the pastor, when people hate something they try to find a "holy" reason to condemn it. It's a shame that in the 21st century there's a lot of people who don't think discrimination is wrong.