That’s an easy question to answer: they were brainwashed by the government Marxist educational system for 13 to 17+ years and thus have no capacity to think - or even function at any level above that of their cellphones, video games or popular TV shows like “American Idol”.
I used to think half of the American public were were halfway sane and at least had the capacity for rational thought.
But not after November, 2012!