Terrorists' cold-blooded attack on a Kenyan college campus, targeting Christian students and killing Muslims in the crossfire, is more evidence of the rot at the root of Islamic extremist groups' ideology. The al-Shabab gunmen attacked Garissa University College in northeast Kenya, slaughtering 147 innocent people, including many in the primes of their lives. The weakness of their belief system lies exposed to the world. No system of belief prospers long under coercion. Hope is stronger than fear.