This is all about the REDEFINITION of "marriage" to be something it's never been,and thus FORCING other states to recognize the abomination via Article IV,sec 1.
Homos are seeking SPECIAL rights and the reordering of US society to suit their agenda and mental illness.
Of course,some people IGNORE the second part of Article IV,sec 1;
"and the Congress may by general Laws prescribe the Manner in which such Acts,Records,and Proceedings shall be proved,and the Effect thereof."
Congress "prescribed the manner" by enacting DOMA.
THAT alone allows DOMA to be Constitutional.
Congress is SPECIFICALLY given the power to decide,and they did.