Josh, we want freedom to operate within our religion. Denying others freedom because it doesn’t fit with your religion means you agree with limiting freedoms.
Guess what? Jews are a minority. If you were a WASP, I could hear your point. I mean, who’s going to outlaw church on sunday? But as a minority we have to be sensitive to these things or our freedoms will be squashed next.
So you want to restrict two adults from getting married because its against your religion? Do you have a secular reason for doing so?
If you still feel like restricting it, don’t complain when shechita is outlawed. After all, we restrict other peoples freedoms, so there is no reason for US to get an exemption.