There are concerns over the offensive and sometimes racist chants aimed at Nerazzurri striker Balotelli by the Juventus fans.
Ancelotti said: "It's a sad story, but it's not racism. It is stupidity and ignorance, the same people who used to call me a pig back when I was in charge of Juve.
"Having said that, Balotelli helps contribute to the tension by behaving in a less than charming manner. That doesn't justify those who insult him and, as I said, I don't think it's caused by the colour of his skin.
"I really like Balotelli, though I'm not sure how difficult he is to deal with and whether Mourinho is forced to punish him like that. I hope he won't waste his talent."