You're wrong, and the reason is that your definition of "far left" is nowhere near far enough. Neither Sanders nor Ocasio-Cortez are far left, and Sanders isn't even a socialist (despite using that label).

Actual hard left - the kind that actually believes in Marx and revolutions - is not a hive mind, but it is true that it tends to be a lot more acceptive of grassroots violence, and things that enable it (like guns). Which is not all that surprising, given the history of the movement.

Look up Redneck Revolt or Socialist Rifle Association to see what I'm talking about.