From"Ball State professor: Religious freedom bill violates biblicalprinciples", WNDU, 2015-03-26, quoting religious studies professor Joseph Marchal:
"In both the Jewish and Christian versions of the Bible, protection of, solidarity with and hospitality for the stranger, the foreigner and the one with whom you disagree are stressed," he says. "Think here, for Christians, of the lessons of Jesus sharing meals with social outcasts. Consider also, for both Jews and Christians, the lesson of the story of Sodom -- which was not considered a story about same-sex eroticism -- that the people of Sodom are punished for violating the code of hospitality. Throughout the rest of the Jewish and Christian versions of the Bible, the lessons of this story are the importance of hospitality to strangers — those who are different — and the problem with ignoring the poor, the vulnerable and the needy."
Marchal believes those who advocate for this bill and a "right to refuse" hospitality to those they believe to be different are engaging in what the biblical texts define as the sin of Sodom.
[Shifting the focus slightly, here's a related comic by Jessica U. on another aspect of what's happening -- what draws mainstream outrage and what doesn't -- (along with a big thank you to my friends who are already making noise about this part as well).]