What has become crystal clear is that when a dangerous imbecile like Trump starts spouting lie after lie -The only way an individual would know they are blatant misrepresentaions of real facts is if you can discriminate between the credible and non credible media sources and pundits supporting those facts.
That requires the ability to weigh evidence and have some spectrum of choices for analysis.
It's not brain surgery BUT definitely a bridge too far for undisciplined minds.
The divide IS definitely between those that can read and engage in nuanced thinking and analysis and those who accept any information, from any sources, that reinforce their emotions - as gospel.
That divide is bridged by better education and all the factors that create an environment for that education and greater mental acuity (and even emotional equilibrium)