and well.. Carlo got what he deserved at the end of the first movie...he was a greedy pig and a lousy disrespectful husband.
Carlo got clipped because he set up Sonny to be murdered. Being greedy and a lousy husband wasn't a factor....
Of course, that's based on the movie. In a real life situation, Paul Castellano had his son in law whacked because of spousal abuse and infidelity.