Napoli fans protested when their hometown club hero opted to leave the Stadio San Paolo in the final days of the transfer window.
"Everyone has their share of the responsibility in this affair, just as Fabio said recently," agent Beppe Bozzo told Il Mattino newspaper.
"He takes 30 per cent, the rest goes to the clubs and the Coach. It's obvious that without everyone's consent after Juve made the offer, this move could not have gone through.
"We need to see a bit more honesty. Fabio is not a traitor, nor a hypocrite."