[comex]

What I don't understand is why supporting self-publishing (and even what Amazon has been doing in that regard), and perhaps disliking the publishers, equates to supporting Amazon's bargaining against the publishers.

After all, one of the things this feud demonstrates is how enormous a share of the book market Amazon has and how strong a bargaining position it therefore has. That's against a big publisher who, whether or not it's acting fully in the interests of its authors, is basically collectively bargaining on their behalf - in the self-published future, most authors would have nobody to bargain for them. Regardless of how nice Amazon is to them at the moment, surely this is asking for trouble in the long run.