I always wonder - why are most rightists that I know so incredibly dumb??
Simple
It makes total sense that leftists would consider most people stupid.
Think about what leftism is.
It's about government control of the economy and government control of people's beliefs and attitudes, generally through political correctness.
Leftism is all about control over people.
If leftists thought people were capable of intelligence, they would not seek to control them.
Leftists and progressives have no confidence in human reasoning.
They have no respect for common sense and no reverence for objective knowledge.
All that matters to leftist progressives are feelings.
That's why they use media and government to do everything in their power to shape, curb and influence people's feelings.
Enlighten yourself with this article that explains it quite well.
drhurd.com/2017/07/14/64826/