As far as I remember the term "alt right" was coined by literal nazis in an attempt to hide the fact that they were nazis. The dogshit liberal media picked it up and ran with it for a little while, but it's not really being used anymore for good reason. They're all just "right", there's nothing "alt" about it. "Alt left" was never a thing.

And anyone who can look at the state of the world today and not get radicalized are not to be taken seriously. The only "extremists" are the people who think everything is just a-ok and that radical change is not needed.