It is now widely believed, even in US government circles, that the war on terror is counter-productive. Especially the wars in Iraq and Afghanistan, the torture in Abu Ghraib and the detentions in Guantanamo have produced a backlash and have increased rather than reduced the terror threat. The 2007 National Intelligence Estimate issued the following among its “key judgments”:
The Iraq conflict has become the “cause celebre” for jihadists, breeding a deep resentment of US involvement in the Muslim world and cultivating supporters for the global jihadist movement. (source)
The war on terror has created and exacerbated resentment, hatred of the West and anti-americanism. And with anti-americanism often comes hatred of democracy and freedom and Islamic radicalization.
Read more on the war on terror here.