The simplest answer to people who claim that Islam promotes terrorism and killing.
Let's take a look about what Allah says about this in Quran.
2:190 "Fight in the way of Allah those who fight you but do not transgress, indeed Allah does not like transgressors".
Three string statements in one verse:
1- Islam promotes fighting when it's for purposs if self-defence.
2- Allah gives a clear statement not to transgress or invade others.
3- Allah does not like it.