The bigger your audience, the more nuance is lost. People in large groups are bad at thinking because the group energy takes over. Which I think explains Trump's success. Individual Republicans think he's dumb as a box of rocks but get them all together in one place and they start chanting death to libs while he conducts the symphony. All nuance about specific facts or policies are thrown out the window and it reverts to pure tribalism. When everyone around you is shouting hatred, that isn't the time to interrupt and point out that maybe the enemy isn't that bad.

I'm not dumb enough to think that doesn't happen on the left as well to an extent, but currently at least it seems a much bigger problem on the right. I hope once Trump is out of the way, no one else is quite able to capture that spark again.