Can of worms. I don't want to get into it. But homosexuality is wrong, and the government should not force everyone to treat it as if it is just the same as heterosexuality. If people want to do it in the privacy of their own homes, fine. But it's being taught in schools and courts say parents can't opt their children out, wedding photographers are losing lawsuits for declining to photograph gay weddings, doctors are losing lawsuits for declining to artificially inseminate lesbians (even after giving a referral to a doctor who is willing), marriage counselors are losing lawsuits for declining to counsel same-sex couples (come on, if you believe same-sex couples are sinning, your honest counsel would be "break up," and what same-sex couple would sue to force that person to counsel them rather than going to someone else who is willing to counsel them?) and a Methodist church was forced to allow a gay wedding in a pavilion it considered a religious building or lose tax-exempt status for a summer camp (they offered to allow the wedding on the non-religious boardwalk on the same property but that wasn't good enough).
Gay rights are not in the constitution. Religious rights are in the constitution. Yet now gay rights are trumping religious rights in the courts. That is one good reason for the citizens of California not to allow the government to legitimize same-sex marriage.
That's just the tip of the iceberg. The institution of marriage has been deteriorating in this country for a few decades and gay marriage is just another step along the way. Just look at Scandinavian countries where gay marriage has been legal for a few years: no belief that marriage means anything anymore. Huge divorce rates, more than 50% of children not born to married parents, etc. etc. That is not the direction I want to see the state I live in going, and that is the direction it will go if gay marriage is legal. (Of course, legally defining marriage as between a man and a woman is only the barest step toward restoring society's faith in marriage, and true change will have to come family-by-family as parents teach and show good examples to their own children.)
Let me make it clear that while I believe homosexuality is wrong, I have nothing against homosexuals. I have had gay friends and they are just people wanting to live their own lives. I think there are many rights gay couples should have such as hospital visitation rights and inheritance rights. But the definition of the word "marriage" in this country should not be changed to suit them. Gay people should not be allowed to be paid less or be denied the vote or anything like that, but the religious beliefs of people who are against homosexuality should be protected (as guaranteed by the constitution) when they deal with homosexuals in matters central to those religious beliefs. A restaurant owner who happens to be religious can't refuse to serve food to a gay couple, but a doctor or marriage counselor etc. should not be forced to provide marriage/family services to a gay couple if they consider marriage/family to be religious issues. (Yes, I am aware of those churches that support homosexuality. )