Is it Bigotry to Advocate Gay Marriage but Oppose Polyamory?

Turns out the Greens aren't as progressive as they have us believe: Is it Bigotry to Advocate Gay Marriage but Oppose Polyamory?:

If you are gonna say that marriage is about “love not law,” and cannot be restricted by “religious prejudices” or “get your religion out of my bedroom” – to quote the standard mantras – then the same apparent bigotry of opponents of gay marriage is committed by opponents of polyamory. It is grossly hypocritical to be in favor of gay marriage and yet to be opposed to polyamory because the same arguments for gay marriage can (and will be) used for polyamory.