On the other hand, no religious or secular moral system ever advocated same-sex marriage. Whereas advocating interracial marriage was advocating something approved of by every religious and secular moral tradition of America and the West, advocating same-sex marriage does the very opposite -- it advocates something that defies every religious and secular moral tradition. Those who advocate redefining marriage are saying that every religious and secular tradition is immoral. They have no problem doing this because they believe they are wiser and finer people than all the greatest Jewish, Christian and humanist thinkers who ever lived.

But as objectionable as hubris is, false comparisons are worse. And there is no comparison between different races and the different genders. There are no inherent racial differences; there are significant differences between the sexes. To the extent that racial groups are different, they are only because their cultures differ. But a black man's nature is not different from that of a white man, an Asian man, an Hispanic man.

The same is not true of sex differences. Males and females are inherently different from one another. We now know that even their brains differ. And those differences are significant. Thus, to oppose interracial marriage is indeed to engage in bigotry, but to oppose same-sex marriage is not. It simply shares the wisdom of every moral system that preceded us -- society is predicated on men and women bonding with one another in a unique way called "marriage."

Comparing the prohibition of same-sex marriage to prohibiting interracial marriage is ultimately a way of declaring the moral superiority of proponents of same-sex marriage to proponents of keeping marriage defined as man-woman. And it is a way of avoiding hard issues such as whether we really want all children to grow up thinking it doesn't matter if they marry a boy or a girl and whether we really want to abolish forever the ideal of husband-wife based family.

Those who wish to redefine marriage for the first time in Jewish, Christian or secular humanist history may offer any honest arguments they wish. Comparing the prohibition of same-sex marriage to prohibiting interracial marriage is not one of them.