Marriage is a religious institution, and God doesn't want gays to marry. In his article in the 1999 Jan 18 National Post, Brad Aisa made the following argument. Gays are not demanding a religious ceremony, but the secular rights of marriage that heterosexuals enjoy. Many straight people who marry are not religious at all. Conversely, many gay people are religious, and have undergone religious bonding ceremonies, ahead of legal sanction of their relationship.
Many churches now sanctify gay partnerships, and even more are considering it.
If gays are allowed to marry, they will be able to adopt kids. They will molest them and make them turn queer. The people most likely to molest children are straight males. Gay males and females are much less likely to molest children. Children raised by gays show the same likelihood of being straight or gay as children raised by hets.