Are you really implying that Putin is more authoritarian than Stalin?
When it comes to totalitarianism Stalin's Soviet Union was more complete than Nazi Germany, which retained more vestiges of the old social order, so being "like Nazi Germany" doesn't make you "more authoritarian than Stalin", only "slightly less authoritarian than Stalin". Of course Putin is neither, but his regime (and in particular its relationship with oligarchs) is more like a "milder" version of Nazi Germany than the Soviet Union.
