It's not strictly correct to say, "a federal district court judge
struck down Utah's marriage law." Utah's marriage law is just
fine, except for the extra part that was grafted on to specifically exclude
same-sex couples. That's the only part that was struck down. Except for a
few FLDS types, no one even has any quibble with the rest of it.
Attitudes towards same-sex marriage have changed drastically since DOMA and Prop
8 were passed. The greatest portion if this change can be
attributed to the trials over DOMA and Prop 8. The public became aware of two
overwhelming facts: 1) prohibiting SSM causes actual harm to real people, and 2)
there are no legally valid reasons for prohibiting SSM and causing these harms.
A sub point of the second fact is an awareness that allowing SSM
does not cause any actual harm in the world. There are some who
claim that requiring Christians to follow anti-discrimation laws in their
business dealings is a harm, but as the baker in Colorado showed us, that is not
really about marriage, since Colorado currently prohibits SSM. There
are others who bemoan the children being raised by same-sex parents. But again,
this has nothing to do with SSM as evidenced by the fact that same-sex couples
are currently raising children without being married. Marriage will not create
this situation, but it will stabilize existing families. SSM is
winning in the courts for the same reason it is winning in public.