You might be flamed but I reluctantly agree. Besides the X Amendment there is the full faith and credit clause. In the 40s, 50s and early 60s partners seeking divorce ended up in Reno Nev. States like NY which recognized adultery and physical abuse as the only reasons for dissolution of the marriage still had to recognize Nevada divorces when the parties returned to NY. The purpose of DOMA was to allow states the cover of federal statute if the will of the legislature or polity did not want to accept same sex marriage when those same sex partners returned or moved to their state.
Well minded individuals should just let the states decide and if the states decide for gay marriage, then be appalled, try and change minds, or find comfort in the end of days line, whatever helps you sleep well at night, but don’t pretend you know the constitution better than anyone else, and no I’m not talking directly at you, more so the post I picked to rail against the people that think they know more than they do.