This raises an interesting question for me.
The invasion of Ukraine enjoys popular support inside Russia - around 70%. The justification continuously put forward regarding why such a large proportion of the Russian population supports the invasion is that they've been brain-washed by state media into believing that Ukraine requires "de-Nazification".
That the Wagner group enjoys such popular support, while their Nazi sympathies are also common knowledge^ makes this justification questionable.
My best, admittedly totally speculative, guess right now is that the Russian populace has a far better/non-brainwashed understanding of the geopolitical situation than what is commonly suggested, and that while everyone is happy to go along with the de-Nazification pretence, in reality the populace harbours the same ambitions for a return of Russian imperial power that the Russian leadership does, and also holds similar moralistic perspective.
^I believe this to be the case, but I'm not certain. At the very least there doesn't seem a state sponsored campaign to hide it