Destroying the bedrock of civilization for the selfish gratification of a very small group is cultural suicide. Civil unions gave them all they had asked for, but that wasn't enough for the hard core activists. Once you 'define' marriage as being a union of people who love each other regardless of gender, then there is no logical objection to incestual marriage (as we see already in Europe). Polygamy and polyamory are also not far behind. Some gay marriage proponents have already said as much. There seems to be no end to the process of 'defining deviancy down'. Also, my black friends are livid that these folks try to link their demands with the civil rights struggles of the 50s and 60s. Seeing Julian Bond do that was especially sad.