I'll add another Bezmenov quote that I believe to be equally apropos here regarding the mindset of Leftist under the influence of ideological subversion:

“As I mentioned before, exposure to true information does not matter anymore,” said Bezmenov. “A person who was demoralized is unable to assess true information. The facts tell nothing to him. Even if I shower him with information, with authentic proof, with documents, with pictures; even if I take him by force to the Soviet Union and show him [a] concentration camp, he will refuse to believe it, until he [receives] a kick in his fan-bottom. When a military boot crashes his balls then he will understand. But not before that. That’s the [tragedy] of the situation of demoralization.”