I agreed with most of this article. The only soft spot I thought was the policing for the current protesting. As we now can see, much of that policing was pulled back when protesters somehow policed themselves. The system responded the way it should have responded (with a few faultlines, of course).
I don't think we to look deep into history to find the errors of the Constitution. I, a Canadian, was able to figure this out with my amateur approach. I wrote an article on my findings:
Shortly after I wrote that article, I read a book called "Lies My Teacher Told Me." The writer explains a vast discrepancy between American history at the high school level and the American history at the college level. The very errant high school version inculcates citizens into believing a myth, where words like "freedom" just magically appear.