Ignoring the rest of your argument (not being a party to it), this particular bit isn't a synthesized argument, but rather a direct quote by ex-KGB defector Yuri Bezmenov, who defected to the United States in the early 80's near the end of the Cold War, and gave a series of interviews and lectures about how the Soviets planted some very disruptive seeds in western (especially American) culture as early as the 50's, infiltrating academia, think tanks, government institutions and protest movements in a campaign of destabilization.
What he's describing in that quote is something he called "demoralization" -- not in the "oh gosh it's hopeless I give up" sense, but in the "removal of all reasonable morals from a person's belief system" sense. Literally deleting morals from a target. It's not a coincidence that so much social upheaval began in the 50's and early 60's. That was concerted effort to undermine the "nuclear family" (i.e. the stable family unit), weaken the social fabric among neighbors, within towns and even entire cities, dismantle the sanctity of marriage (with no-fault divorce, popularizing swinging and "free love"), and so on.
And his explanation is accurate and has been proven out time after time in the 35 years since he surfaced -- a person who's been properly demoralized can not be repaired. It's permanent damage. You know the joke about how Trump could announce, plainly and simply, that "the sky is blue," and there would be no end of people who'd bend over backwards explaining why it isn't? That's an illustration of TDS, but that's just a symptom of demoralization. Empirical evidence is nothing to them (a moral of a sort that's been deleted -- instead, it's "don't trust your lying eyes"). You could take such a person outside on a crystal clear day under a perfectly blue sky, point to it, take a picture of it, click a pixel in the photo in Photoshop and get the hex value of the detected color, show them it's fucking blue, and they'll still argue with you.
A Soviet ambassador (I forget which one) once famously stood up at the UN General Assembly and told the US ambassador to his face that the USSR will defeat America someday without firing a single shot. They damn near succeeded thanks to this subversive bullshit. It's still playing out, and these protesters are the latest symptom, programmed from childhood to believe certain things and ignore all evidence to the contrary.
