[agracier]

Pardon for my ignorance, but Russians fighting for Nazis is just outrageous.

Being born a certain nationality does not predicate unwavering allegiance to that nationality. Geographical birth locations do not really have anything to do with how people experience allegiance to nations and governments. This has far more to do with how governments treat their subjects and/or citizens. Which is why tyrannies of any kind, be they fascist, communist, religious or capitalist, left or right-wing, governments that oppress their citizens will generally be their own cause of generating and creating opposition to their rule.

The main reason there were not more Russians fighting on the Axis side is that National Socialist ideology predicated racial treatment of Russians on just as awful a scale as did Soviet ideology. These people were therefore caught between the proverbial rock and a hard place, having to choose between the devil or the deep blue sea. Whatever choice they made, they ended up losing.