And what were these "sacred warriors" doing before?
As yet, nobody on this thread has submitted one piece of reliable information that leads to the conclusion that large numbers of people who weren't terrorists before have only become terrorists because we're in Iraq.
And even if you stipulate that, even if we had never touched Iraq, do you think that none of these radicals would have been upset about Afghanistan being overrrun and the Taliban, one of the greatest achievements of radical Islam, being taken down?