this is a great point, and accurate.
I can confirm that trying to reason with even semi-reasonable shitlibs is virtually impossible. I've had to invent very new ways of trying to penetrate their brainwashing.
If they even remotely detect that you're going to say something that might even possibly counter their ingrained narrative that they receive from their media sources, they will just immediately shut down and refuse to even allow your words and ideas to enter into their mind. They're the most close-minded people alive, in the literal sense of the idea that they are unwilling to even so much as entertain anything that isn't already within the SYSTEM that they are a part of.
And that's just it... the "left" isn't really "the left." It's actually just the entire culture as a whole, represented by the media, the corporations, the celebrities, the tech firms, the talking heads, the universities. It's the entire thing, the regime, the "establishment" that they have immersed themselves inside of. And their "membership" to that club, that system, that establishment, is kind of like membership to a cult. It is their entire life, their entire validation as human beings. And anything that seems to penetrate or burn at the edges of that carefully curated "order" or structure that holds that cult in a semi-cohesive state, is identified as a threat to their existence. And so they have the defense mechanism of rejecting it by refusing to allow it through the cell membrane. It's psychological and social self-preservation, in that sense.