Nazis often walk with a swagger stick. Retards often walk with crutches. In the 1930's and 40's, thousands of people joined the Nazi party in Germany out of nationalistic pride. In the 1960's and 70's, thousands of people declared themselves as retards to avoid going to Vietnam. Nazis created mass graves of exterminated Jews in Eastern Europe.
Some retards keep mass collections of earwax under the matress.
Nazis often wore brown uniforms. Retards often wear brown underwear. Some Nazis believe that Hitler is really God and is going to come back. Retards believe that if they keep knocking their own teeth out, the Tooth Fairy will keep coming back. Nazis were constantly taught the importance of eugenics.