Yes, I agree that same sex marriage is only a proximate end to the ultimate end of destroying religion and making the idea of "religious liberty" irrelevant and inapplicable.

At the same time, when it comes to same sex marriage, I have never seen religion as the primary opponent of those proposing it. Religion did not invent marriage. Marriage arose out of human nature as male and female. The deeper attack is not on religion; it's on human nature itself. We see increasingly an intent to disregard human nature, no matter the consequences. It's not just that only man and woman can form a conjugal relationship. That's a matter of biology. It's that many refuse even to accept human biology. They don't care how they are made. They want to do what they will to do, human nature be damned.