As above, it's partly Russia trying to drag this war back to the optics of 1945, but also referring to Ukrainians as Nazis is a casual anti-Ukrainian slur by Russia. The Ukrainian resistance fought alongside the Nazis against the Soviet Union during World War II, so that part of their history is complicated to put it lightly. What countries don't have a complicated relationship with parts of their history though? What countries don't have monuments to or symbols of things that many of us would rather were left in the past?
True enough. As an F1 fan I immediately think about the British fascist Mosley, and how years later his son managed to shake off the stain of his family name and turn it into one that's now known for car safety - saving countless lives. But the stain will always be there to some extent even if the descendants have done completely different things in their life.
If Russia really want to play the "your country used to do this/that" game then they're just as guilty as everyone else. What matters is what they do now, and right now all I see is Russia committing war crimes.