could the 14th amendment be used to force a state to allow polygamy?

According to the supreme court, "Marriage is one of the "basic civil rights of man," fundamental to our very existence and survival.... To deny this fundamental freedom on so unsupportable a basis as the racial classifications embodied in these statutes, classifications so directly subversive of the principle of equality at the heart of the Fourteenth Amendment, is surely to deprive all the State's citizens of liberty without due process of law." This refers to the Loving case, where Virginia's law that a white guy can't marry a black girl, was found unconstituional.

Well, there is a law that forbids a fundamentalist Mormon form marrying a woman, then marrying another woman while still married to the 1st one, and then marrying a 13 year old girl.

A few years ago I would think that was something a man should not be allowed to do, but with the gay marriage movement going on now, I would think that if the 14th amendment forces you to allow a woman to marry another woman, it also requires you to let a man marry another woman. i.e. he has already got his 1st wife and he wants to marry another woman without divorcing the 1st one.

If you got equal protection for ALL citizens, then a lesbian's right to marry anybody she wants must be defended equally as an already married Polygamist's right to marry again.