Reminder, re the tankie meme about Ukrainian collaboration with the Nazis: *all* occupied countries in WW2 had collaboration. South Korea was even run by collaborators like Park Chung-hee. Some countries had more collaboration with war crimes (Lithuania), others less (Italy). Russia and Ukraine were both pretty bad, if not Lithuania-bad. The main difference is, Russian nationalists play down the role of their collaborators where Ukrainian nationalists used to play it up in opposition to Russia.
Best I can tell, the focus on Ukrainians is because they alone didn't really get to tell an imagined story of resistance after the war. Hiwis and Trawnikis came from the entirety of occupied Eastern Europe plus some from Western Europe - plenty of concentration camp guards were Slovak, Russian-Cossack, etc. But after the war, Czechoslovakia got to rewrite its history and so did Russia, but Ukraine had its history written by Russia, which turned OUN into a much bigger and more unique thing.

@Alon

"The Sound of Music" taught us all about poor little Austria.

@citykidPVD Austria has the absolute worst we-are-the-real-victims syndrome. They're even worse than the Poles (who suffered horrific abuses and had relatively little collaboration) or the Lithuanians (who, for all their enthusiastic collaboration, were still brutalized, if less than the Poles or Ukrainians or Belarusians). They were an integral, enthusiastic part of the Third Reich; the von Trapps famously left the country, and less famously could do so easily, unlike in the film.