Here it is again, so you guys will finally stop moaning :
"I told [Juve coach] Ciro Ferrara that I couldn't say no to Fiorentina. I'm delighted to return to Florence."
http://www.uefa.com/competitions/ucl/news/kind=1/newsid=871200.html
-----------------------------------------
It was his decision. He even accepted a big pay-cut in order to go to Fiorentina.
I don't blame Zanetti. He obviously wanted regular playing time and no way he could have that guaranteed in Juve. He could have chosen to sit on the bench, play from time to time, and earn double more money in Juve, but his wish is to play.
No blame for the management and Ferrara either. What were they supposed to do if Zanetti himself wanted to leave? They couldn't guarantee a starting XI spot to him and they surely couldn't offer him a pay-rise in order to convince him to stay.