re: Will anybody who previously support gay marriage admit it was a mistake ?

Gay marriage is the single dumbest argument.

God himself decides if a marriage is blessed or not. Not a priest or a pastor.

So, what people are mad about is the right to hold a ceremony.

You'll never stop them calling themselves married. They're gonna get married. And the law should not have any jurisdiction over them having said ceremony. That's draconian.

You either believe in individual rights and freedoms or you don't.

God has the ONLY say on the part that actually matters.