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Friedman's putative revisionism aside.
What you just attempted to shunt to the sidelines is the exact topic of Glenn's post, i.e. "Teh Point". It's even stated in the title, which is conveniently posted at the top of each page of comments, for people such as yourself who appear to be challenged in ways both mental and physical.
The purpose of "going back" in this context is to show how Friedman, like so many of his cohorts, refuses to learn from, or even admit to, his past failures. That was, and will remain, Glenn's point irrespective of the amount of arm- (or other appendage-) waving you engage in.