Any political group that promotes nationalism must fuel anger, fear, and hatred. To do this you must have a "Them" or outsiders, many or the minority groups in Germany fit this bill quite well. Jews and gypsies had long been disliked by the average majority of Europe for centuries before the Nazi's capitalized on this distrust and anger. It helped to rally the masses behind a common cause, the hatred toward the minorities were just a means to an end.
Mainly racial ! The Nazi's persecuted Gypsies , Mentally Retarded , Insane Asylums , Disabled people too . Not just the Jews , anyone who was deemed inferior was persecuted . They wanted everything to be cleansed for their Master Race ! Barf !!!!