Leftism is NOT about convincing or persuading or even informing. If it were, Leftists would be eager to discuss things with “non-believers” and the “unconverted.”
But they aren’t. Far from it.
And THAT is a dead give-away! No, Leftism’s goal is to gain power, often through a kind of “Stockholm Syndrome.” See, de-humanizing, ridiculing, coercion, domination, and avoidance of reasoned debate are the real goals, not persuasion or convincing.
It is a sort of religious cult. And THAT is why they refuse to have their cherished beliefs questioned. “Just shut up and drink the &#$^ Kool-Aid!”