Why are Nazis still protected?

All countries and most of their people except Russia want to pretend that Nazis weren't bad and they even defend their sadistic actions just because they didn't play a major role in the Nazi regime. For example, most of the camp guards at Nazi concentration camps were sadists, but people try to defend them. Why? I notice this is the mentality in the west. It seems westerners hate Russians more than Nazis and they even have sympathy for Nazis.
Why are Nazis still protected?
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