RE: olivant

Micheal ordered the killing of his own brother. Fredo betrayed the family which almost led to the death of his own brother/brothers family. He then continued to allow Micheal to remain in danger instead of helping. Yes Micheal was 'insidious' but Fredo was not much better.

Most of Micheal's 'immoral' decisions were strong business decisions, ones that Vito had to make and ones that Fredo/Sonny would have had to make if they were Don. Perhaps, the murder of Fredo doesn't fall into this category but it's debateable. If you conclude that Fredo 'knew it was going to be a hit' then most people agree that killing Fredo was a 'neccessity'.

I can't really accept the notion that Micheal was innately worse moralistically than any of the other males in the family .