Those are the two most dangerous groups - both are totally at war with the constitution and liberty.
I didn't used to think so, as far as the "fundamentalists" went anyway, but repeated alliances between those two disparate groups on policies meant to deprive the rest of us of freedom and the right to be "left alone" over the past few years have convinced me that you're absolutely right. Maybe I just wasn't paying attention before, or had a "no enemies on the right" attitude.
No more: my long-held contempt for the politically correct left is almost matched by my growing disdain for their neo-puritan allies in the ranks of the fundamentalist "vice crusaders".