He's right, of course. Leftists cannot engage in dialogue because they themselves know their positions are completely indefensible in a rational debate.
It's why they always have to resort to force.
Anyone with a brain knows this is an attempted world takeover by the Left -- old hippies (some of them billionaires), their Prozac'd kids, their Adderalled grandkids, and their other acolytes.
While the military of the so-called free nations sits silently watching it happen.
To enstate comunism or marxism. They are playing It by the rulebook.
“In my study of communist societies, I came to the conclusion that
the purpose of communist propaganda was not to persuade or convince, not
to inform, but to humiliate; and therefore, the less it corresponded to
reality the better. When people are forced to remain silent when they
are being told the most obvious lies, or even worse when they are forced
to repeat the lies themselves, they lose once and for all their sense of probity. To assent to obvious lies is...in some small way to become evil oneself. One’s standing to resist anything is thus eroded, and even destroyed. A society of emasculated liars is easy to control. I think if you examine political correctness, it has the same effect and is intended to.”
Written by Theodore Dalrymple