I see this article mostly as wishful thinking.
It is possible that these events may come to pass. But, just as likely, these events could come to pass:
1) Mr. Biden cannot get his agenda through Congress. He becomes an impotent president. Many D voters in 2020 will decide to stay away from the polls in 2022 and 2024.
2) Mr. Trump retains the leadership of the R's. His base is still very committed. He loses the election. He says the next round of elections were stolen (again), leaving the base with no choice but to take matters into their own hands. They are only waiting for the word.
3) Another populist R leader arises. This one is smarter and has a pretty good idea on how to pull off a coup.