One of the points:
The promotion of gay marriage requires the same dismissal of gender differences: if a woman and a man bring utterly distinctive attributes to any marriage then same-sex unions lack the balance, the fusion-of-opposites energy, that constitute the very essence of male-female partnership. If men and women possess fundamental, unavoidable contrasts involving their physical, intellectual, emotional and spiritual realities, then it’s ridiculous to claim that a male-male partnership is the same as a female-female partnership – let alone comparable to the combination of manly and feminine elements that characterize traditional marriage.
In a sense, the position of gay rights advocates has become contradictory. If replacing a bride with a second groom on the wedding cake makes no difference in the nature of the marriage, then a female partner is interchangeable with a male partner. And if the core differences between men and women count for so little, then it’s hard for homosexuals to claim that they can only feel attraction to their own gender. If men and women are, essentially, the same, then why can’t gay people choose opposite sex partners and spare us all the trouble of redefining the nature of marriage and upending the social order?