At an online I am a part of, one of the members posted various interpretations of Zidane’s headbutt.
As seen by the Germans:

As seen by the French:

As seen by the Italians:

As seen by the Americans:

As seen by Israelies:

As seen by the press:

As seen by the readers:

Thanks to all those readers who suggest that Zidane was in fact saving Materazzi’s life.