Doc - I agree with pretty much everything you're saying, and in doing so would reiterate Mr. Manning's concluding paragraph:

"In a word, reinvent our politics and means of political expression to acknowledge and redirect the underlying causes of populist uprisings rather than simply denying or decrying their existence."

I think Mr. Manning would agree, as Doc points out, that all of us have contributed in one way or another to our degraded political dialogue.

However, Doc, I don't fully agree with your concluding point on censorship and silencing. Fox News, Breitbart, and all the other vile alt-right media outlets and social-media trolls are the ones who are most accomplished at shouting down and intimidating their opponents.

Here, too, the left and the right are equally culpable of shaming and demonizing.

"Reinvent our politics and means of political expression."