Someone that does a mass murder-suicide, apparently while representing a group like say, Hindus. While in reality belonging to another group like, say Muslims that want the world to hate Hindus and wish to start a culture war. Or, the murderer could be from a third party in disguise, like atheist socialists that want both of them to wipe each-other out. Either way, this is a form of black propaganda.
"Hindu" shoots up Sikh neighborhood, actually a Shi'ite Muslim? Anti-Martyr.