I was watching Hitler’s Bodyguard yesterday. The narrator pointed out that the NAZIs were socialists yet Hitler despised the communists, who were also socialists. The narrator explained that it wasn’t because of policy differences that he disliked them. It was because the communists were too willing to defer to Moscow. He wanted a Berlin centric world.
Which is also why Stalin helped Hitler to eliminate the German Communists after Hitler gained power. Moscow was worried that had the German Communists gained power in Germany, they would have rivalled Moscow for control of the World Communist movement.
The conflict that we had with the Western Allies was incidental to this primary struggle between the two competing and fundamentally opposed forms of socialism: National and International.
Leutnant Thomas Beike, Luftwaffe pilot, as quoted in D-Day Through German Eyes by Holger Eckhertz (second edition, 2022)