Is there one portion of the population that are allowed to own guns, and one that isn't? If so, what is the difference between those populations? I hardly think a gay marriage is going to shoot anyone from a bell tower.
Whether or not you see that it is important to them does not change the fact that it is. If you were arguing for your rights in a similar matter, would you want random gay people debating whether or not they considered your position to be good enough to meet with their approval? I think not.
I think that accusing the gay community of "rejecting traditional society" is a sweeping generalisation and bit of a red herring, given the decades or discrimination, ostracisation and persecution. Regardless of the more exotic elements you see parading once a year, or being lampooned or exploited in some daytime chat show or comedy, most gay people are everyday humans who are just trying to get on with their lives like everybody else.