I thnk your all wrong about Mike and Tom's relationship, Mike loved Tok but it was a tough love. As far as being bumped down Mike knew Tom would always be loyal to his family for all they have done for him so really it didnt matter if he had a title or not because he could and would still help the family regardless. Mike left tye famil to Tom for christ sake, how much love, trust, and respect does thwt show?
Why do you think Mike would wantt to punish Tom? Because he wasnt a real Corleone? Yea Mike and Tom didnt hung and kiss everytime they saw each other but Mike was a better don because of Tom, and Mike knew that as well as dd Tom.