The Unbelievers spend their wealth to hinder (man) from the path of Allah, and so will they continue to spend; but in the end they will have (only) regrets and sighs; at length they will be overcome: and the Unbelievers will be gathered together to Hell
Quran 8:36

The Words of Allah Almighty explains it best.

And no Muslim should take part in this so called War On Terror.