“You are stuck with them. You cannot get rid of them. They are contaminated. They are programmed to think and react to certain stimuli in a certain patterns,” he said.

“You cannot change their mind even if you expose them to authentic information, even if you prove white is white and black is black you cannot change their basic perception and their logic of behavior. In other words, [with] these people, the process of demoralization is complete and irreversible,” he said.

http://www.visiontimes.com/2015/08/30/former-kgb-agent-explains-communist-ideological-subversion-in-america.html