Following are the orders that comes to the conduct of War.
1. Do not commit treachery
2. Do not deviate from the right path
3. Do not mutilate dead bodies
4. Do not kill children
5. Do not kill women
6. Do not kill aged men
7. Do not harm or burn trees
8. Do not destroy buildings
9. Do not destroy an enemy’s flock, unless you use it for your food
10. When you pass people who have devoted their lives to monastic services leave them alone
Above orders given by Muhammad (peace be upon him) which must be obeyed by every Muslim against every Non Muslim.
There is nowhere in Islam, whether it be in the Quraan or the teachings of Muhammad, that promotes the killing of innocent people. A real muslim is one that is real against terrorism.