I read a quarter of that, skimmed another quarter and gave up on the rest. The entire premise of that article is flawed. Know how I know that? The column is about what the campaign sought to accomplish but ultimately failed to do. Unless I missed it, there is no sourcing from Sanders or his campaign to verify any of this. It's presented as a factual post-mortem, but it's total theory, of which he seems to have no particular insight outside of some cherry picked quotes from other sources stripped of context.
I don't know why this column, which is a testament to the vastness of the internet, deserved to be the basis of a new thread. This is the greatest example of your blindspot, sys, this is a flawed slice of confirmation bias that has no value greater than any other progressive think piece out there.