I think that he should be scolded for false historical revisionism. It's not true that just 7% of Germans were Nazis. Predumably he uses membership in the Nazi party as the criteria. In 1940 it is more like 70% then 7% if you measure by who actually supported the Nazi regime.
Of course it is equally not true that only 5-10% of muslims are extremists. The vast majotity of them are extremists.