Would Tessio seeing Sonny was running everything into the ground and pretty soon, there won't be one place in Brooklyn Tessio can hang his hat! switch sides to Barzini, to speed things up?
Tessio won't have to set Sonny up to be murdered as Tessio did with Michael. Sonny would do it all by himself!
What about Clemenza? There won't be nothing left to build on....
