On Tuesday, California will vote on Proposition 8, a constitutional amendment to ban same-sex marriage and repeal the marriage licenses from same-sex couples who are already married. As a constitutional amendment, it would not only impose and enforce this single belief on everyone, it would be entirely immune to legal challanges.
The state consitution was created to ensure that everyone was entitled to equal treatment under the law and that everyone could pursue their own happiness. Writing in provisions that deny existing rights to a minority group while keeping those rights for the rest of the majority is a terrible abuse of the constitution and its spirit. There is no argument against same-sex marriage that justifies a law forbidding it, and one can look to countries (like, saaaaay, Canada) and states that enjoy equal marriage rights to see that no harm has come of it.
Californians, vote NO on Proposition 8.