The whole point is that it's a misrepresentation to suggest that Islam has turned away from peace in the first place. This constant conflation of the acts of a handful of extremists with the views of mainstream Muslims is ignorant, misleading and very damaging. You might just as well have said, 10 or 15 years ago, "How do you turn the Irish back to peace?" - when it was, in fact, a tiny handful of extremists who were responsible for the terrorist attacks.
This attitude and divisive language is what leads to further marginalisation and separation, not unity and not racial harmony.