Really, I'm kind of curious if the prevalence of Neo Nazi sympathies in Ukraine a result of mass killings of communists and other citizens/soldiers/partisans by the Nazis, leaving a skewed amount of nazi collaborators? Or is this more due to left wing parties being outlawed in modern day Ukraine and having fascist elements supported by the state?

The USSR probably would have punished collaboration, but what about those that weren't recorded collaborators?

Are there any historical numbers from either side? I couldn't find any myself.