Is the American political and judicial system capable of preventing these groups from becoming an endemic threat to public safety and the functioning of our republic?
Only one side is a threat to public safety and the functioning of our republic. The other side is a response to said threat. CATO can suck a dick.
More info on this sad excuse for a "think tank":
https://en.wikipedia.org/wiki/Cato_Institute
Charles Koch was a founder. (edited)