>Their internal struggle was against the nobility, the Catholic church and libertarians
Yes, hence why Hitler cuddled with the Catholic Church and corporate oligarchs (who were allowed to keep their private industries) while declaring genocide on communists in the east, right? It wasn't the nobles, Catholics and libertarians who were the first to be purged by the Nat Socs, it was, you guess it, the commies. So yeah, so much for "banner of leftism" when both the Nat Socs and the communists were in open warfare in the streets of Berlin.
>I'm sure destroying any form of tradition
Most cultural elements were preserved. The social life of the communists would be considered far-right by our standards. As I said, they were extremely anti-immigrant, extremely homophobic, bullied minorities, etc. They did have some leftist elements (albeit imposed on them) such as moving away from religion but it was limited. Nationalizing education was an example of leftism as I mentioned earlier (public education).
>The French revolution is the single most nationalist movement in history
Nationalism is not the same as patriotism. Nationalism involves dislike for other countries. The French revolutionaries were patriots (as they called themselves), not nationalists, as patriotism involves loving your country while nationalism is disliking others. The French Revolutionary Wars were an example of nationalism, but the French Revolution itself was patriotism. Important to know the difference.
>Apparently you'd like that 'leftist economy and right society', whatever the second term means, then state that commies in the east had just that, and so did nazis, then complain about them being assimilated.
Yes, both Eastern Europeans and Eastern Germans were right-wing socially. They still are today. Why can't we be like them socially, and like Western Europe when it comes to the economy? Best of both worlds.