He is not a Leninist theoretician, he is a Lenin hypebeast.
He tells democrats (who would otherwise reject him if he advocated for nonparticipation in bourgeois elections) that you can still vote for "the lesser evil" while understanding that Marxism and overthrowing the bourgeois state is the only path forward if they want to achieve their goals.
His whole schtick is torturing ML thought into something disillusioned Bernie fans can accept, knowing that many of these people will eventually seek real ML theory once their anti-communist programming has been reversed. You cannot accept Lenin's theoretical contributions until you have accepted that Lenin is someone worth listening to.
He is the direct counterpart to the fascists that are "just asking questions" in order to lead you to their desired conclusion that ethnic cleansing is in fact very cool and absolutely necessary. These are the most effective fascists precisely because they don't open with "Nazi Germany was based, and the holocaust was righteous" while reciting Adolf Hitlerisms. Doing roman salutes on stream hinders their ability to pass along their audience to the guy who is openly sieg heiling.