Osama bin Laden, thinking he's on a mission from God, attacked the US to incite a war that could be spun as an American war against Muslims. Muslims dead at the hands of Americans radicalise other Muslims. We've seen this play out, and Petraeus understands how this works.
Terry Jones, believing in the same God and heading up the grossly misnamed "Dove" church, is burning the Qur'an to incite an American war against Muslims. Dead Americans incite other Americans to war against Muslims. We've seen how this works.
These people need a padded cell and their own chapter in DSM-V.