The “theocracy” argument is a liberal (false) one; nobody is putting forth any law to establish a federal church. The point of the First Amendment is having the ability to have free exercise of religion especially because the federal government is not theocratic.
That is not Christian when one’s actions works against one’s free exercise of religion, with all due respect. And the gays are not doing it to make themselves more free, but to attack Christians—who thus far are their only targets in this respect.
Well then as a method of attack its going to be about as effective as knocking on the door of a Jehovahs Witness and asking for a copy of the WatchTower.