If liberals say that they want marriage to be redefined to allow for the legalization of same sex marriage, that they want marriage equality for consenting adult homosexuals and that consenting adults should be allowed to marry based upon love, and then turn around and say that they don't want marriage to also be redefined to allow polygamous marriage, that they aren't for marriage equality for polygamists (just for homosexuals) and that marriage should be based upon love for homosexuals but not for polygamists then they show themselves to be hypocrites. And they also lose that valuable weapon of calling others bigots because they show themselves to be bigoted against polgamy.
BUT, for liberals to avoid being tagged as bigots (as well as being hypocrites) then they would have to say that they support the legalization of polygamy as well - which would undermine the push for same sex marriage being legalized. Two front war.
The third front liberals open up on themselves when they bring up the Bible somehow supporting polygamy. Jesus never supported polygamy. He quoted Genesis which says that marriage was meant from the beginning to between one man and one woman. And there are NO scriptures which condone same sex marriage.
Let consenting adults do what they want behind closed doors, but don’t ask society to accept it.
...and rape, and pedophilia, and sex slavery, and bestiality, and necrophilia, and whatever else anyone thinks they may "need" in order to "feel" fulfilled.
I make this argument all the time. It drives the gays apoplectic because there is no effective rebuttal for it except to say, “You are mean.”