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If this man was upset because of Israel, Hezbollah and the war in Iraq, wouldn't it be politically motivated violence? Please note, that in the west the term ""Muslim"" (after 9/11) carries a lot of political weight as well. 

The above are very good points. There is another point:
Should one non-significant member of a group (consisting of more than a billion members) be considered representative of the entire group? Thus if a Christian blows up an abortion clinic, should the incident be categorized as ""Christianity and murder""? "