Being Straight Makes Me a Better Christian?

When I get married, my partner will be a man because that's just what my sexual preference happens to be.  Seeing that I am a woman, my government says I have the right to get married.  So putting that together with the reasons non-supporters of gay marriage give, I can only come to one conclusion: I must be a better person, more patriotic, have better morals, less likely to get divorced, be a better parent, protect the moral fabric of this country, and raise children who will grow up to be healthy and upstanding citizens.   Because if none of this is true, then shouldn't my right to get married be taken away as well? For example, If I have shown a propensity to cheat on my past boyfriends or if I have been married before and had gotten a divorce, then shouldn't my right to get married be taken away since I'll probably endanger the sanctity of marriage if I were to marry again? What if I said I hate children or I don't plan on paying child support in the case of a divorce from my spouse? Under our laws, I can still get married, couldn't I? So long as my partner is the opposite sex, our government has full faith that we will not endanger the sanctity of marriage, that is essentially what they are saying. Wow.  That is some faith.

Not to mention the Christian argument!  They say homosexuality is a sin, and therefore we must oppose gay marriages.  Sounds pretty simple, actually.  But here's my question.  I am also a Christian.  My faith is very real, and without God, none of this is worth it for me.  He is the best part of my life and I'm always trying to grow in my faith.  And yet, I am still a sinner!  I gossip, I have impure thoughts, I become angry at times I shouldn't, I hold grudges, I waste my money on material things I don't need instead of giving it away to help the needy, I get jealous, and I can be very impatient at times.  So does this mean then that I don't deserve to get married? What if the person I'm going to marry struggles with the very sins that I do? What if after we get married, we continue to gossip, be greedy, or hate other people? How can these Christians allow the two of us to get married when the same reasoning tells them that gays cannot?

Someone, please, make it simple for me. Explain to me just how this anti-gay marriage thing works, because I just don't get it.

I see nothing "Christian" about saying that two people who love each other cannot get married.  I see no love, acceptance, or open-minded in that.  I see judgment, hate, and self-righteousness, and I simply cannot subscribe to that kind of reasoning.  It breaks my heart to see Christians holding signs and screaming at people whose only fault is that they want to marry someone they love.  How can there be so much judgment and self-righteousness in a group of people who profess to have tasted God's grace and mercy so personally? I simply don't get it.