One sure sign of a made-up God is that the people who make Him up invariably ascribe their own prejudices and biases to Him, in order to make them officially binding on everyone else. Christians and their Jewish predecessors demonstrate this by their traditional portrayal of God as a virulent homophobe and bigot who does not wish merely to deny gays the right to get married, but wishes to deny them life itself, if they are ever so presumptuous as to become intimate with each other as heterosexuals do.
A genuine divine spirit would have no need of such arbitrary and unfair discrimination against gays. Homosexuals are no different from anyone else except in one thing: they fall in love differently than heterosexuals do. And this is not a difference that does any harm to anyone. It does not rob, or lie, or assault, or kill. It does not damage the environment or crash the stock market or start a war. It’s two people falling in love. What’s to hate?
Homophobia is a carnal impulse, an almost instinctive reaction. It might be explainable as a by-product of human evolution, favoring individuals who direct their sexual energies towards actual reproduction. That doesn’t make it right, of course, but it does help us to understand our carnal nature better so that we can restrain it where necessary in order to behave in a civilized manner.
God, meanwhile, should not be subject to this kind of carnal urge. He does not reproduce. He allegedly has not evolved. There is no point in having Him arbitrarily single out gays just to discriminate against their sexuality and to deny them the same right to love as heterosexuals enjoy. No point, that is, except to validate the prejudices and phobias of the people who invented their God to serve as a sock puppet for their own hatred.
Thus, the human frailties and injustices ascribed to God by believers themselves betrays the fact that He is a fictitious reflection of the people who invented Him, and not a genuine deity. In their mindless crusade against marriage equality and their “traditional” support for discrimination against innocent people, Christians are exposing the mythical nature of their faith.