I would like someone smarter than me to explain why the nazis hated communist russia if nazi-ism is the same thing as communism.
Germany was very militaristic and nationalistic. They were still proud about Germany having finally become a nation in 1870 and were unwilling to espouse a cooperative "world government". They felt the German race was superior and wanted to run their state (and other nations they conquered) along those lines.
Russia was "one-world government" minded. They wanted an international brotherhood of workers to rise up and defeat all foes. They leaned more toward an intellectual elite to run their program than a forceful, military cabal like Germany.
These are some of the major differences as I see them. Perhaps someone else can point out others, or point out where I might be incorrect.
Two common megalomaniac ideologies and each thought they were the master race destined to conquer and subjugate all others. Sound like another ideology with its goal of establishing a World Caliphate through the Sword?