...what country are you in?...in the american model religion plays a dominant role in this sort of thing...and religion is NOT known for its tolerance of those that don't mimic the dogma...that said, frankly I'm a bit surprised...this guy has made a career out of never taking a stand on anything...so I'm surprised he did now...(I've yet to see him address black unemployment numbers.)...that said it certainly was the correct position...don't think it's enough to make me vote for him though...
it does depend on the interpretation of the religion.
I live in the netherlands, officuially we are a protestant country. my fathers whole family is christian, and they still support gay marriage.
there has been some controverse tough, I think it was a few years back, when a member of a small christian party(the CU, christian union) said something against homosexuality or so, I don't really remember what he said but I think it was something along the lines that it was okay to be gay but not to show it(like the don't tell, don't ask policy in the US military
an example of how the interpretation can change:
when women viting rights were introduced here, the christian parties were morally/fundamentally against. the others didn't have a sufficient majority to change ot of the christian parties voted against. but at the same time there was an issue around schools. the christians wanted their own se[erate christian schools, while the others wanted public schools for everyone.
so they struck a deal. the non-christian would vote in favor of christian schools, abd in turn the christians would abstain from voting for the women voting rights(because of their principles they didn't want to vote in favor, but by abstaining from voting they still gave the others enough majority)
so at that time, women voting rights must've been similar to how gay marriage now is viwed in the US. but by now you won't see members of our biggest christin party saying anything against women voting rights. only the SGP, our most radical christian party(with their powerbase in the biblebelt), is still against women voting rights, altough now only against passive voting rights, not active voting rights.