However I still think Barzini was the mastermind behind it. I think it’s very possible Sollozzo had no idea Barzini was manipulating Tattaglia and I think Barzini wanted it that way for obvious reasons.
The novel says at the Commission meeting, that Tatt was led by Barzini's hand or something to that effect.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.