Gays’ won over the Supreme Court in the past through the use of fake science.  Read How Gays Tricked The Supreme Court.  The Bible clearly states and repeatedly states that the sexual activity of Gays is AGAINST NATURE.  In the Bible, “against nature” means mentally unsound; that is, done by a mentally ill person.  Here is one example of a verse that says Gay acts are against nature (mentally unsound [done by a mentally ill person]):

Romans 1:26-27:  For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature:  And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet.

Observe, also, that the sexual activity of Gays is a sin (note the words, “vile,” “lust,” “unseemly,” and “error”).  For more information and detailed information see Gendrome.