The guy hates the DiFronzo's.
He's been blackballed by Elmwood Park.
He is associated with known Con Man Outfit hater Joe Fosco. All of Joe Fosco's stories come from Mike Magnafichi.
They did not come from Willie Messino. Willie would have never discussed murder details with a goof like Fosco.
He's been arrested 5 times for shop lifting.
He has an addiction problem.
He's broke and never has any money.
He has no known income.
When he pretends to not want to discuss certain things on that bullshit Sportscast Behind the Scenes Show with Fosco, He's already discussed all of it with him privately. It's all an act.
If he would tell his friend Fosco everything he knows about the Outfit, why would he not tell the Feds what he knows from the past and receive some compensation for it?
I would bet money he is an informant. He's the classic prototype: The bitter disillusioned man who has addiction problems and no money.

I am not a Mike Magnafichi hater, I'm just putting forward the evidence to see what anyone else thinks about it.