a) Eradication of Bolshevism/Marxism which is seen as one of the two primary threats to Germany and western Europe (the other being Jewry).
Nevertheless had Germans been less racially focused and more interested in securing Europe from Bolshevism as they claimed then it would not have been impossible to win the war by toppling the Soviet government.
Well it's the same thing in Nazi ideology. Bolshevism is just a tool of international jewry. (Its not even lunch and Im writing like a nazi, yay!) You can't have the nazis focus more on ideological struggle and less on the racial one, when their own ideology puts an = between bolshevism and the Jews. Thats why they'll more or less always refer to it as "Judäo-Bolschewismus". Their ideology makes any ideological struggle against Bolshevism be the same thing as the racial struggle against 'International Jewry'
And if they didn't have the racial policies they wouldn't have gone to war in the first place so the point is pretty much moot.