I'm trying to determine what would have been construed as being critical to the U.S. in that passage. National Socialism had been voted into power in Germany t

I'm trying to determine what would have been construed as being critical to the U.S. in that passage. National Socialism had been voted into power in Germany through legitimate means just a couple of decades prior to the book being released. I doubt it'd be taken as an implicit critique in pointing out that even democracies can be abused. After all, it was this realization during the formative years of the U.S. that lead to measures such as the Bill of Rights. I don't think there's anything offensive here.