Sasuke would have left either way. Think about it.
Sasuke:...No one has followed me *begins to cry*
Sasuke: I'm going back to the village
Yeah, I don't think so. More like it's Itachi's fault for not killing his family fast enough. Then Sasuke would have been clueless and never had anyone to aim his hatred at. Thus, the vents that you said would have never happened. Even father technically it's Tobi's fault. Even farther back it's Hashirama's fault. Even farther back it's the SO6P's fault and then even farther back it's where ever the Juubi came from's fault. Wonder where that is.