It is very hard to brainwash the adults, with the fanatic ISIS propaganda. That is why they are targeting the kids. Little children can be easily brainwashed, and in a year or two, they can be converted to highly effective killing machines which don't have humane emotions. Trust me, these children will make the current ISIS guys look like angels in comparison, when they grow up.
No doubt about that, the children will adore them as their heroes and when grow up they will do radical things like ISIS did. Thats why most of radical organization involved children in their action and recruit that kids as their army. Got 'loyal' army and great successor at a time.
