The Sir Salman Rushdie pull-out - first physical, and then virtual - from the Jaipur literature festival must come as a huge embarrassment for India, a nation that openly talks about its aspirations of becoming a superpower. Once again, the so-called "mighty" Indian state has succumbed to threats of violence from fringe, trouble-making religious groups. Once again, it has been proved that it only requires the threat of violence to hold India to ransom.