On the contrary, she bases her trust in the interpretation of 21 y/o preacher Matthew Vines who argues that the Bible does not, in fact, condemn all same-sex relationships. He has launched The Reformation Project, a nationwide network of pro-gay evangelicals committed to ending their churchs longstanding hostility toward gay people.
According to the link I posted: "Even some of the most prominent evangelicalsmegachurch pastors, seminary professors and bestselling authorshave publicly announced their support for gay marriage in recent months. "
With no single authority, other than the Bible, this is what happens when anyone can interpret scripture. Lacking one spokesperson for the Evangelical Church, members split and divide according to whichever pastor has grabbed their ear.
Oh, you want a single authority? Like Pope "who am I to judge" Francis?