I wonder if the Nazis killed anyone in Soviet territory or did anything particularly heinous that would disgust anyone.
(I kind of wonder if Quora should be disallowed cause it's just easy pickings)
https://www.quora.com/Why-did-Winston-Churchill-oppose-killing-SS-officers-after-the-war-Did-Stalin-want-them-dead-for-revenge-or-to-stop-a-future-Nazi-Germany
He's right that SS officers would go on to oppose the Soviets (after they were put in charge of NATO and West Germany)