Do you think the Soviets should have run around slapping random people who used to be in the Wehrmacht? Do you think throwing your milkshake at some German who supported Hitler in 1932 would have stopped the Nazis?
Punching random goons achieves nothing for the people. It is not praxis, it is not a revolutionary action, and saying you support it doesn’t suggest that you take actual steps to oppose anyone.
Nietzsche wasn’t a nihilist, though. Nor was Heidegger.
And Heidegger diving into the reactionary deep end is incompatible with Nietzsche, whose actual argument re: nihilism was that things like history, tradition, and Heidegger’s “authentic Volk” are without value.