All the New York Families supported Sollozzo. But it was the Tattaglias who became close partners with Sollozzo's crew. And remember that it was Barzini people that killed sonny, Not tattaglia or other button men from another family.

What I always wondered without backing would Sollozzo had moved against the Don? If he did Sollozzo would have been a cornered Fox.

During the 5 Family war would you think it was the Corleones who did most of the senseless killings? I mean when ya think about it, sonny is a Hotheaded enough to order so many killings.