If we have a freedom to religion, then how does the government have the authority to assault polygamists?
It has the authority to do so because people don't give a crap about the first amendment until it protects their own interests.
What's with all of you people who can't just live and let live? Blessed are the peacemakers, right? But if you advocate using the coercive/violent powers of the government to win your way over others, then you are not a peacemaker. You are a conquerer, and I'm pretty sure that they weren't blessed on the mount.