You're acting as if Nesta quit Lazio, it was quite the opposite really.. Lazio where in a state of financial crisis, much more so than ours during Calciopoli.. They're future fundamentally depended on A. New ownership (Lotito) and somewhat just as important B. raising revenue, how can you attack Nesta's loyalty when Lazio as a financial identity had no choice to sell him.. E.g if you were bankrupt would you keep your prised Bentley when you have no money to buy food to eat?
Nesta helped Lazio a lot more than you are giving credit for and I don't think you understand the exact nature of Lazio's woes in this very time period you are talking about