Sure. None of the models are perfect (even the 2d chart might be too simplistic: maybe a it's a 3-dimensional saddle), but if reduced to a particular dimension (like authoritarianism as you mention, or even other aspects like their disdain for the rights of minorities) the horseshoe is blindingly obvious.
And even if it's a "not-all-leftists" thing, I think the general response of the non-problematic leftists is to deny this branch of their movement even exists and instead flippantly dismiss the voices of concerned minorities by saying "class reductionists aren't real and it's all in your head" and often followed up with (after being shown evidence) "even if they are real, there will be no issues after we solve the class problem, so shut your mouth class traitor", which is wishful thinking at best and has no basis in any historical evidence.
I took kung fu as a teen and I remember my teachers telling me a story about how the grandmaster essentially beat up a homeless person for asking for money.
I think they were trying to communicate how badass the grandmaster was but it just made him seem like a dick.