The socialism part was fake. The named it so because socialism was popular and the promises are hard to distinguish from some right wing parties. In the past jews were the main enemy, now its muslims.
Seems to me the Jews are still very much target #1, not-further-specified migrants #2 and with black people a clear #3 (strange to see that in Germany), and while it mentions muslims, there's 10 hate slurs against Jews for every 1 mention of muslims.
Oh, and the first mention of muslims seems to be encouragement of Palestinian shall we say "actions against Jews" in like the 7th mail here. But yes, it does get quite negative after that.
But yes, after that it does go quite negative.
The socialism part was fake in the sense that Nazis were populists, they promised whatever would convince large amounts of voters, and of course weren't anything remotely like convinced socialists. But it goes much further than that. They were purely after power, right down to the personal level, and that went pretty damn deep in the Nazi party. In other words: they believed in essentially none of their standpoints and you could argue they don't belong to any side of the spectrum (nor did they care about any kind of academic or economic classification of their standpoints). And so if you look at the fake standpoints, the promises they never intended to keep, those are socialist promises. They implemented a lot of them too, which is were more confusion comes from.
But they were hardly the only party that could be credibly accused of openly lying about the standpoints they personally hold, and those parties are all around the spectrum. And the people who were convinced ... that didn't help either. The KPD very much openly expressed support for the Red Terror at the time of Nazis, that is not a lie, and probably really was a big reason for voters to vote for the Nazi party.
Today AfD, die Linke and DKP have all 3 been very obviously caught receiving Kremlin aid and very publicly supporting Russia, AfD leader Alice Weidel recently even going to far as indirectly defending Russia's attack on Ukraine:
https://www.youtube.com/shorts/hzb8aSMDwag
But ...
https://www.theguardian.com/world/2022/sep/19/germanys-die-l...
(at least in die Linke, you can say that it's the dominant faction that supports Russia, while clearly there is very vocal opposition against them in the same party. In AfD, the members clearly don't care. Almost like most AfD votes are protest votes rather than AfD votes)
Something similar is happening in Austria. Every extremist party is supporting the Kremlin.