leftism is the political manifestation of real and measurable impulses in poorly socialized humans.  it usually starts in childhood, with dysfunctional parenting mixed in with the dogmatic beliefs of socialism. by its own creed, socialism can never fail it can only be implemented and executed poorly by people. this would qualify it as a atheistic religion, which is what marx originally intended. he applied theosophical and hermetic principles materialistically and out came socialism and it's many bastard children.  you don't see splintering like this in the sciences but you do see it in religions.  much like "debating" a fundamentalist christian, you can't reason with leftists. also, much like how people de-convert, they usually have to either be abused or burned by their fellow believers before they snap out of it. it's not the logical process that gets them out but fundamental human nature. some of the more famous anti-woke youtubers were at one point socialists until they got backlash for doing x,y, or z. count dankula comes to mind off the top of my head.  leftism is also robust in that doubts, value incongruency, remorse, mental incongruency, etc. are all excused away by the ideology itself. all natural human reactions are reconstituted and utilized as tools to continue pushing their religion, which primarily revolves around creating discord and chaos. combine that with the dopamine/adrenaline hit that you receive dominating and manipulating others and it's no surprise that many leftists are as rabid as they are.  they literally get off to it. the rush reinforces not only their behavior but beliefs. it feels good to revolt, rebel, and reform. it has a transcendental spiritual vibe to it, that they are shedding their old selves (who are often miserable and of low-status) and giving them a purpose as this "new man" who gushes forth revolutionary zeal.  as a normie, they don't matter. as a leftist, they are making "history".
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