From Andrew Sullivan, a conservative blogger:

This president wants our families denied civil protection and civil acknowledgment. He wants us stigmatized not just by a law, not just by his inability even to call us by name, not by his minions on the religious right. He wants us stigmatized in the very founding document of America. There can be no more profound attack on a minority in the United States – or on the promise of freedom that America represents. That very tactic is so shocking in its prejudice, so clear in its intent, so extreme in its implications that it leaves people of good will little lee-way.