Although I feel that homosexuality is wrong, I feel that it is more wrong to discourage stable relationships. And I think it is horrendous for any church to try to be so influential in the national government. I certainly hope Islam doesn't start legislating its' beliefs.
Here is a quote that is in the holocaust museum in Washington DC, and I think it applies well to gay marriage:
First they came for the Socialists, and I did not speak out --Because I was not a Socialist.
Then they came for the Trade Unionists, and I did not speak out --Because I was not a Trade Unionist.
Then they came for the Jews, and I did not speak out --Because I was not a Jew.
Then they came for me -- and there was no one left to speak for me.
Although I am saddened by the results of Proposition 8 in California, it is really interesting to see democracy at work. A judge was creating laws instead of enforcing laws, and the people took democracy and set one of the new laws back to how it had been.