My fundamental problem with Angels in America: Perestroika

This is a post I've been meaning to write since I saw the HBO adaptation, or for almost eight years, though I am no longer using the absolutist shorthand of "the fundamental flaw." It assumes a familiarity with the play and involves spoilers for the entire thing.

I am finally getting around to this post because rushthatspeaks posted about reading the play, and in comments, I said I could sum up my problem with part two as "What has Joe done wrong?" Which turned out to be too succinct: I should have said, ( spoilers )