Jews and other people were imprisoned because it was believedthat they would infect the purity of the Aryan people and nation.In other words, they were feared to have eventually destroyed theAryan race.While the above is true, the Nazi's needed a scapegoat, andplayed upon long standing hatred, fear and misunderstanding ofJews. Most political systems throughout the world, throughouthistory have tried to find or have a scapegoat.It benefits a government to proclaim it is protecting thegeneral population by having laws against a minority. These lawsare often turn to focus upon other minorities. Jews to Gypsies forexample.