The NSDAP had no love for Marx or any related theorists or activists, so whatever authoritarian tendencies one might find in Marxist literature would have been quite irrelevant to the theorists of National Socialism, if we can even call them that.
Unlike Marxism or even socialism in general, fascist movements like National Socialism remain largely a political aesthetic or practice, rather than a coherent ideology that can be rationally engaged with. This is one reason why fascisms fit in so well in so many disparate political movements from the 1930s to the present - as long as one can turn any given ideology towards the primary goals of fascism - violent machismo, eliminationism of political opponents, racial or cultural supremacy, and leadership cult - there seems to be almost no limit to the kind of beliefs one could attach to it.
Both paragraphs above are indeed correct, so I tend to think that maybe you had me saying something I wasn't saying nor implying.
BTW, for what it's worth, I was sponsored on a study the Holocaust here in the States, in Poland, and in Israel, including teaching a three-week unit on it in my poli sci course. After I returned, my #1 focus was to study the NAZI propaganda machine and how and why it was so effective. With this part of my study, I went through myriads of additions of Der Sturmer.
I hate to say this but the tactics used by Trump in 2016 and 2020 was pretty much the same. If we are to believe his first wife Ivana, this may not be by coincidence as she said he often kept NAZI materials on his bed-stand to read before sleeping.