It's tough to listen and imbibe a truth that totally smashes ones belief system. For them to even consider another point of view requires critical thinking skills to overcome the brainwashing they've been subjected to through schooling and media of all types for the past 50 years. For these progressive/lib's, they cannot conceive that they have been socially engineered to become what they are and have been programed to enable the destruction of this county and western civilization.
People do that which makes them feel good and these leftist have to much emotional energy invested in this communist world vision to admit they have no ability for self awareness and to recognize they've been had. The ego forbids it.