If it were Gambino because he was upset over all the attention, why would he have colombo shot in public during a speech of all places? Wouldn't that only service to bring even more attention?
Also, I thought it was proven that the gallo boys weren't part of the anastasia hit. I thought they found a thumb print on the getaway car from joe biondo and it's assumed it was other gambino's who did the shooting?
The attention that Gambino was concerned with wasn't attention in the publicity sense,but rather attention in terms of Law Enforcement being all over the mob like white on rice. The public slaying served a two fold purpose. First,it sent a message that anyone in the mob would understand,namely that this Civil Rights B.S. was going to end,and that the Commission was behind that decision.Secondly,it was an acknowledgement to Law Enforcement(FBI)that Columbo was a loose cannon and that his harrassment of them was not sanctioned by the Mafia as a whole.
The location of the killing left no doubt in anyone's mind as to the reason for it.
