On the news, they got an Italian lip-reader to try and work out what Materazzi said. According to him, he wished 'an ugly death to Zidane's family', and just before the headbutt, he told Zidane to go f*** himself.

I think I would have been a little angry too if someone said that to me, but whether that's an excuse to do what Zidane did I really couldn't say...