Terrorism takes many forms in India including ethno-nationalist terrorism, religious terrorism, left wing terrorism, and narco-terrorism. Ethno-nationalist terrorism involves creating a separate state or emphasizing the views of one ethnic group against another. Religious terrorism focuses on imposing religious imperatives against other religious groups. Left wing terrorism views all existing socio-political structures as economically exploitative and seeks revolutionary change through violence. Narco-terrorism focuses on creating illegal narcotics traffic zones. Examples provided include violence by Tamil and tribal groups, the 2008 Mumbai attacks by an Islamic group from Pakistan, Maoist violence in several states, and drug violence in parts of India.