Wasn't marriage like, 'created' for the christian religon, though?
Perhaps at first, until the government decided to tie benefits to marriage, such as hospital visitation, and pension. Now it is like saying
"Oh, well, you can't visit your partner in the hospital if they are dying because you are gay."
Or,
"No pension for you because you are gay"
Or even
"You have no right to marry because my God says it is bad"
It is not just denying gays the right to marry it denies gay couples financial assistance that they desperatly need to raise children and pay bills.