The had the person walk up grand stairs. They convinced these people that they would be sent to the great heavens. So they usually gave in. They would lie down on a table like thing and off with their head. They kept the skeletons.
He believed in making a new "perfect aryan race". Jews didn't fit that description, so he decided to kill them. He killed anybody really, but Jews were his main target as he was very anti-Semitic and blamed them for basically all of the worlds problems.
2a+ay+2b+by
basically it's just multiplying them together