Liberals hate leftists. Hate them, hate them, hate them.
They don’t often admit it of course. Admitting you hate those to your left at least as much as you hate those to your right would cause a lot of cognitive dissonance for those who think of themselves as being on the left, and it would weaken their arguments considerably.
But they do. Liberals hate leftists, for a number of reasons.
Liberals hate leftists because there is a night-and-day difference between a capitalist, imperialist establishment and an ideology which wants to tear down that establishment and replace it with peace and socialism. There’s more of a difference between true leftists and establishment liberals than there is between the far right and establishment liberals.
Liberals hate leftists because the psychological discomfort known as cognitive dissonance actually hurts, so those who provoke it can often be perceived as the cause of that pain.
Liberals hate leftists because they’ve spent their whole lives building and reinforcing a worldview which validates war, oligarchy and exploitation while thinking of themselves as defenders of equality and sanity, so when someone comes in promoting an ideology which highlights the discrepancy between those two points the cognitive dissonance which sets in makes them feel like the leftist just slapped them in the face.
Liberals hate leftists because while both purport to support the working class and disempowered groups, only one of them actually does so.
Liberals hate leftists for the same reason someone telling a bogus self-aggrandizing story at a party would hate somebody who caught them in one of their lies in front of everyone.
Liberals hate leftists because leftists are a constant reminder that liberals are not the thing they pretend to be.
Liberals hate leftists for the same reason you’d hate someone who keeps yelling out “This is all fake! Those are actors!” at a theater: they disrupt a pleasant illusion the liberals are trying to enjoy about villains being fought by heroic protagonists.
Liberals hate leftists for the same reason a wife who is informed that her husband is cheating on her will often turn her anger upon the person who told her: they made it hard to hold onto the delusion that their setup is working out fine.