With the exception of the smashwords issue, all of those articles relate to Amazon fighting with publishers. Not one of those articles alleges (apart from the smashwords issue) that Amazon is forcing up the prices at other retailers.What does Wallmart do every day: negotiate with suppliers to get the best deal for itself. What is Amazon doing here?
Yes, there is a risk that Amazon may be so dominant that it can push up prices, but that is mostly a theoretical risk (smashwords excepted).
So, perhaps an investigation is warranted, but, in no way does that mean the Apple should not be fined for its actions.