She claims that buying the @washingtonpost will give Bezos (indirect) influence over the coverage of Amazon in the press, through self-censorship. If this is true then it should be easily verified empirically, but unfortunately she does not suggest that.
It's not that I think there isn't cause for concern, but allegations of bias against the @washingtonpost are serious, and until they are grounded in evidence they are little more than conspiracy theories. #NightofPhilosophy