Libertarians fighting social conservatism, is social liberalism.
It is why they call themselves libertarians.
Small "l" libertarian simply means a lover of freedom. I also don't fit into that pre-formed ID mold. Nobody does. That's why we have states so people can vote and live in a state with like-minded people. As the name of this site says, we are a free republic (free to pursue our lives without centralized governmental power).
The federal government forcing their perversions on all of us is the big problem. Those who don't recognize that by thinking government done another way is the solution are unwittingly helping the Left.