They're just dummies who have let their echo chamber convince them they're smart.
High technology and pervasive communications have given people of their ilk such an overblown sense of their own validity that our civilization is now drowning under a tidal wave of their nonsense.
That's why Trump is so clever to keep referring to them as "stupid politicians." His message is: it's not leftism, or rightism, it's stupidism that's causing the problems.
Well, it doesn’t immediately cause warning flags to go up to a Leftist, so I think you have a point there.