You claimed that prior to 65 marriage meant between two people, when it actually meant between one man and one woman.
If you accept marriage as a contract between "two non familial consenting adults" than you are accepting limitations on people's fundamental rights.
So, why are some restrictions, that you support, ok, when others aren't? (that just happen to be the ones you don't support)
What fundamental right are you speaking of? The right to marry a person who cannot legally consent, or to marry more than one consenting adult at a time?
Obama, and Hillary, all have views that have evolved over time. Mine have not been entirely consistent, but that's more because the GLBT folks in my religious denomination have not been entirely consistent in what they ask of me.
The latter.
Though traditionally there is more support for the former than there is for definition of "marriage" than the gays claim.
Legally, I think the polygamists have an argument provided on one thing. Can they show no demonstrable negative effect on children raised in such unions? My experience in Utah, is that opponents certainly can show a negative effect on the kids .... with boys being cast out and female child "brides' being abused. However, the authorities in Utah do not want to address polygamy.
its not just polygamy, its all sorts of multiple marriage, 4 men/6 women for example, plus mother/daughter, father/son, siblings, etc. all done to avoid inheritance taxes or income taxes.
and there arguments will be equality, discrimination, fairness, marrying who they love, civil rights, etc. the exact same arguments being made by the gay marriage mafia today.