I could be wrong, but I think what he means is that the radical left tries to "impose" it's will, rules, and beliefs on people in a highly oppressive manner.What does the left not living and let live have to do with it out of curiosity? I'm failing to understand your point. I try my best to base my thoughts, opinion and action in logic and reason not what the progressive left does or believes.
On a side note, the right does it, too, but with seemingly less zeal. Libertarian minded folks with us the least. I like not being with. The problem is that a sane and qualified Libertarian candidate will never be allowed to ascend to the presidency. The deep state, swamp, permanent government, whatever you want to call it, is forever entrenched. We will never see real change.