You see what makes a Nazi isn’t actually killing millions of people. It’s only killing millions of Russians. The reason why the Nazis are evil is not actually because they are evil but because they went against the Russians.
That’s how many of the Russians see it anyway, and by extension many tankies. The only difference is tankies have to try and sound reasonable to a Western leftist audience.
If you want the really specific term, it’s Jim Crow, after the Jim Crow laws passed in the south after reconstruction. The effects of Jim Crow reach us today and will for a long time