I can barely sit next to someone who opposes gay marriage, let alone be friends with them. 
I cannot keep my mouth shut if I find things like that out about people. 
I met a Canadian family a while ago and we talked about how liberal Holland was in their eyes and all that is alllowed over here and the subject got to gay marriage. The husband then told me the "it's okay as long as it's not called marriage" line, and how he was upset Canada allowed gay marriage and I would not let go after that. I asked him why he saw it this way, he said that it diminished the value of his own marriage. I then asked him how someone else's marriage had any effect on how he and his wife loved each other... He gave me no sufficient answer on that either. We kept going for a while, but I think I drove him mad with my "but why?" questions, but seriously, he was not making any sense...
I was very polite and respectful, but very persistent in getting an explaination. And this was with someone I had met two days earlier. 
Imagine what I'd be like if I find out something like this about a friend 
