...I honestly don't feel the need to have to justify my beliefs on this matter.

But I do? That's discrimination! ;P

Seriously, two things:
I don't see where the government has any right to say that gay marriage is illegal, just because they don't like it.
It's not a question of the government not liking it. It's a question of a majority of the population not liking it. Again, this is a democracy. That means majority rules, whether you consider them idiotic or not.

...the act itself shouldn't be made illegal. It is discrimination to do so.
Not discrimination under the plan I listed, where it obliterates the legal concept of marriage for everyone.