As an anarchist I tried being peaceful with tankies in leftist spaces, but the moment I criticized shit like Putin invading Ukraine they immediately turned on me. These people don't give a shit about leftism they care about state capitalism. After reading Lenin I now know why they hate other leftist so much, it's because he hated them too
Lenin did not hate other leftists. Kropotkin, for example, was one of his favourite writers. His own brother was an anarchist. He did consider non-Marxist ideologies to be incapable of effecting real change or defeating capitalism. It was ‘other leftists” who, in the early days of the revolution, aligned themselves with reactionary forces, attempted to overthrow the revolution, and tried to assassinate Lenin himself.
I've read revolution and state and he literally calls anarchists opportunist, he also destroyed actual anarcho communist communes during the Bolshevik revolution because he saw them as anti-revolutionary, if he liked Kropotkin he didn't like anarchists