You are not homophobic just like whoever wrote that quote above is not a racist. We could try the quote with 'jews and jewish' and somehow not be a antisemite? etc... etc...
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And what race is homosexuality? I thought it was a sexual orientation or preferance. I suppose a black minister or Jewish rabbi suddenly becomes racist if they refuse? I could care less what the Bible says about homosexuality, but I support any religion being consistent with their conscience if they do not want to marry a same sex couple. (even Muslims)
When does the forcing people to do things against their conscience stop? What if I want to marry 2 or more women? What if I'm not Catholic, but I want to be married in the big Catholic church?
Issues like this are better served if gay couples also respect the beliefs & consciences of others. They can just simply find someone to marry them that does not have a problem with it. Simple as that.