The people that defended and enabled Sandusky were not as far as I know public or private supporters of gay marriage.

Some elements of the Catholic Church have protected and hidden pedophiles for decades. Again, these were not by and large gay marriage partisans.

And the Brooklyn Haredim who oppose reporting pedophilia in their community to the authorities and have gone so far as to claim that the rabbis should decide if a child sex crime is worthy of reporting and/or punishment are also as far as I know, fiercely opposed to gay marriage.

In short, pedophilia is a disgusting crime which doesn't have anything to do with gay marriage, gay acceptance or whether sexual orientation should be considered among the elements which would indicate a federal hate crime.

There are ways to argue against gay marriage or elevated level of scrutiny in hate crimes that don't require making the abuse of children analogous to consensual adult relationships.