DOMA Doomed?

A federal appeals court in Manhattan today struck down the Defense of Marriage Act as unconstitutional, becoming the second such court to do so and making it that much more likely that the issue will be decided by the Supreme Court sooner than later. 

I think it's just a matter of time before the so-called Defense of Marriage Act is invalidated. It is obviously unconstitutional, singling out a certain group to be discriminated against. It seems to be the same problem as the "Don't Ask, Don't Tell" law that voted down. I just can't understand the logic wherein one group of unpopular people can be singled out for discriminatory treatment just because the majority disapprove of them. BTW: this makes it even more urgent to keep the Republicans out of the presidency as Romney could appoint more Scalia-like justices to vote against the constitutional rights of gay people.