This is what happens  when people think other people are less than themselves, less then human , or not of their nation because of their religion 

Children subjected to medical experiments in Ausch

German soldiers on the way to Poland. The inscription on the railway car reads: &quot;We are going to Poland to strike at the Jews&quot;. On the left, an antisemitic drawing of a Jew.

German soldiers on the way to Poland. The inscript

German soldiers of IR 117 in their staging area near Kielce/Poland shortly before the launch of OP Barbarossa, June 1941.