Galante was killed because he was seen as a threat. They feared him.
Yup Galante was a nasty SOB. He didnt want love he wanted to be feared and he wanted to be the boss of bosses. I guess being diagnosed as a psychopath will do that
He might have wanted to be the boss, but boss of bosses??
The title died off with Maranzano in 1931. Back then even, nobody could claim to be boss of bosses without the other bosses admiration, respect and approval. The system was scrapped when the Commission was formed in 1931.