Talking will not help. They aren't fools who will blindly accept what we say. They are trained, ibtelligent and have a fixed plan which they follow to achieve their aim. Moreover, i think, they are hypnotized i.e. their mind is controlled by their leader who gives them orders to do certain things.
Indian culture: As I am myself an Indian, I honour it's culture. And Indian culture is the best among all the other cultures because it has so much diversities and is versatile. It disciplined, makes life real, thinks different and broad and moreover, it is one of its kind!
As the name suggests, the IS militants are Islamic. But that doesn't simply mean that people of other religions aren't present in their rebel group. Moreover, if they respect their religion so much that it has an influence in their name of the group, then why are they killing people, for Quran has only propagated peace and is against killing !?