It's no surprise that The Church of Jesus Christ of Latter-Day Saints was all for Proposition 8 in California. What is a surprise it the huge amount of backlash they've received for saying the same thing they've said for years. The stupidity of people knows no bounds.
There are somewhere in the area of 750,000 members of the LDS church in California, but as of 2006, there were 36,457,549 people in the state of California. That means the LDS populous make up around 2% of the population. 5,376,424 people voted for Proposition 8. Now if half the people who are LDS in California are eligible to vote and did vote, and did vote for the proposition, that's still only 375,000 votes. It lost by over 500,000 votes. So there were 5 million non LDS people who voted for your Proposition. In other words, it's not all the Mormons' fault. Marching outside Mormon Temples just makes you look ignorant, so knock it off.
The fact is the majority of the country is still against the idea of same sex marriage. Even everyone's hero Obama was quoted as saying the following: "I'm a Christian. And so, although I try not to have my religious beliefs dominate or determine my political views on this issue, I do believe that tradition, and my religious beliefs say that marriage is something sanctified between a man and a woman." This is also the second time in 10 years that this has been voted on in California, and the results were the same. So, find someone else to blame.