"Of course marriage is a man made institution.
You are arguing two separate things. One is that of gay marriage under a religious definition of marriage, which already takes place no matter the laws of the State, and that of recognition of that marriage and applying the ridiculous number of State and federal laws regarding marriage. The latter is not what is happening.
But as far as the sanctity of marriage, sacredness of marriage or however it is worded there are religious institutions which already marry homosexuals. They are married. As married as any couple in a Catholic ceremony, LDS ceremony, etc.
We just need the State to recognize those marriages not just because of the argument that it is morally right to do so but as well it is practically beneficial for the State to do so. Homosexuals can raise children as well as heterosexuals. They can be a family unit as much as a heterosexual one. They already are, actually. But the official State recognition to protect them and provide them with the same benefits would be better for our society.
The only people who have anything to gain by not accepting this are those who need some sort of sick peace of mind that their religious culture dominates the legal system. That, historically, has never been good for a society."
I believe marriage was instituted by religion and taken over by government.
I am not arguing either side of the issue. I question how one can justify saying that marriage is a right and we need to allow same sex marriage, and at the same time tell people they can only have one spouse or restrict marriage for other groups. Either society can regulate marriage or they can't. Which is it? You spoke of doing what is right. If it is right for same sex marriage then it must be right for polygamy, bestiality, pedophilia and incest. What is good for the goose is good for the gander.