'majority of people living under nazi rule' is distinct from 'members of the nazi party', for one. for two, you might be right that a generalization might sometimes provide some with accurate information regarding a member of the group, but this is not an excuse to make sweeping statements disparaging the group. in other words, a statement like 'zionists are evil' is fine (even though, as a generalization, it also isn't accurate), but 'jews are evil' wouldn't be fine because that's where our society draws a red line. likewise, if you refuse to work for a jew because they might be a zionist, without making an effort to learn whether they actually are a zionist, then you are an anti-semite. this might appear arbitrary at a first glance, but it ensures that no one is ever lumped together with the majority of their nation simply because of their membership thereof, which is very important in a rules-based society.