I haven't read of any condemnation of ISIS by any group of "moderate" moslems. Which tells me that the "moderates" are just as much an enemy to civilization as the "extremists" are.
So then, the solution is simple: The complete eradication of Islam by any means necessary.
Let God sort out the "extremists" from the "moderates"- Right before He sends the whole lot of them to their eternal ruin.
BTTT
BTTT