It was Mike being manipulative. I'm sorry i don't agree with the theory that Mike really loved Tom. Mike treated Tom like shit for the most part. Even before Mike became the evil psychopath he was in Part 2 he was never really close to tom
You're born a psychopath, you can't become one, unless you incur brain damage due to an accident. It's obvious you don't like the Michael Corleone character, and you've every right to do so, but calling him a psychopath without even knowing much about it is plain ignorance.
