Proposition 8 and religious groups

Proposition 8 states that Only marriage between a man and a woman is valid or recognized in California. Most religious groups are for Proposition 8 in California. They believe that marriage should only be between a man and a woman- also that a homosexual relationship is a sin and against God's will, but I always wondered if homosexuality was against God's will and human were made in God's image then why would there be homosexual people? Several other arguments that these groups have is one that gay marriage will have to be taught in schools- a couples concern for their children is expressed in this video. Even if this was a valid argument, parents can still teach their children in their own homes that gay marriage is wrong. Parents can still teach their children whatever values they want to. Another argument is that adoption agencies are going to have to place children with homosexual couples even if the adoption agency is against same-sex marriage. Another argument is that churches may have their "tax exempt status challenged or revoked if they publicly oppose same- sex marriage". These are just a few arguments that religious groups have for the passing of Proposition 8. Of course as most of the people in California know, Proposition 8 passed- 52.5% for the passing of the Proposition and 47.5% against, which is a really close vote. I hope that one day gay marriage is allowed in California because I think that everyone should have the right to get marriage to whomever they want to.