You're the one arguing for forcing your moral disapproval of someone else's marriage decision. You are the one arguing against individual liberty. You are the one arguing for bigger government. And why? Because 51% of the population want it that way? Funny how collectivism is a bad word, except when you want to use it to further your agenda. 51% of the population votes for bigger social safety nets, that's it right? You drop your objection? Let the people decide, right?
The founding fathers would weep at your authoritarianism.