As a bonus you were already promoting the extremists who supported bombing those kids.
So you not only have more extremism you have extremist groups opposing each other, so there are no good sides. Just extremists on both sides.
It's not the "radicalization" (hating someone that bombed your school is hardly radical) that surprises me, but the location. With all of its bombs and drones and facial recognition cameras and PRISM internet surveillance, and last but not least, the Atlantic ocean, the US can't keep the fight "over there"?