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He is an Indian (and a British Citizen), Ahmed Salman Rushdie is a Kashmiri Muslim, born in Bombay (Mumbai) He is a writer of great repute. He wrote Midnight's Children (about Bombay) which was made into a film by Deepa Mehta. He got Booker prize for it.
Then came the bomb. He wrote Satanic Verses, deriding and scoffing at Islam and Qu'ran and the Prophet of Islam Mohammad. This book was banned in India by Rajiv Gandhi.
Iran's Ayatollah Ruhollah Khomeini issue a Fatwa against Salman Rushdie and called for killing him. Also there a huge amount promised as award. He took shelter in UK and UK provided in securiy.
He also has a PIO (People of Indian Origin) card and therefore does not need a visa to visit India. He has visited India dozens of times. Only this time there is a controversy.