Of course that is not to say that no soldiers were tribal. There were those that actually believed the Jews were a problem, but as someone earlier said, the youth that signed up to fight were attracted by their sense of German nationalism that the army provided, not necessarily racism. Chances are, he signed up not to exterminate the Jews, but to defend his country.
the two are one and the same. national socialist doctrine said that jews and bolsheviks were the ones who were attacking germany, and as von reichenau said,
"The most important objective of this campaign against the Jewish-Bolshevik system is the complete destruction of its sources of power and the extermination of the Asiatic influence in European civilization."
this was an official order from the top general on the eastern front. there's no way that it could be taken any other way (because it's a loving military order, lol). sure, unofficially german soldiers may not be convinced of this ideology. but officially, they were obliged to through explicit military orders that used racism and anti-semitism as justification.