That’s because Madoff was not insane – just (it would seem) very greedy. I would venture to say that Aron is probably insane.
Has anyone thought that maybe he was possessed by a dybbuk? Cases of possession by a dybbuk are well documented. There is the famous story with the Chafetz Chaim and a dybbuk – that was only circa 100 years ago,
Please don’t get me wrong – if Aron was of sound mind and responsible for his actions then he is the epitome of evil and I would be happy to carry out justice and put him to death myself if so paskened by a Sanhedrin.