a thief gains atleast some amount, big or small by looting someone. a corrupt gains money by bribing or being bribed. a murderer gains his revenge atleast, be it good or bad.
what did these muslims gain? nothing... even their ego is unsatisfied. they still wanna kill, they wanna kill america, they wanna kill india, they wanna kill all those hundreds of millions of people who aren't muslims.
the rest of the world is too big to be executed by muslims
