Let’s Have a Gay Parade (and get off my float!)

I am actually having a really hard time with this. It seems cut and dry to me. You can believe what you want, but let others be free to live their lives.
Yet I see some of my “friends” on social media railing against the supreme court decision to legalize gay marriage on the federal level, in all states. People who I know to be basically good-hearted, decent, nice people, are spewing intolerance, claiming to stand for what’s “right.” I can handle them not agreeing with the ruling, but to actually support and/or laud others’ efforts to undermine it and keep gay people from getting married goes too far.  
Who are you to decide what’s right? Don’t tell me “God decided” because we don’t all follow your God, and marriage was around before your bible anyhow. And if you are going by your bible, are you going to ask the courts to stop granting divorces too? Because that’s also a sin according to leviticus…that and about 75 other things these same people probably routinely do, like eating pork! Quick, defend God, ask the supermarkets to stop selling pork!!
 
But I am not here to change anyone’s mind.  I actually have a question.  Basically, I am left with the question to unfriend or not to unfriend? As I said, some of these people are otherwise some of the nicest people…but the fact that they support taking away other’s rights really does not sit well with me…
Opinions? How have some of my like-minded friends handled this dilemma?