MUMBAI AND THE SILIGURI GAP
Before we get started, let's first dispense with this stupid name of "Mumbai." The place is Bombay and that's what we'll call it. The city was created and named by the British East India Company in 1668, after the Hindi name for the area, Bambai. It was just typical politically correctness to rename it in a local dialect (Marathi).
As Bombay was created by the Brits, so was all of India as a unified nation, as they stitched together hundreds of small kingdoms and petty statelets ruled by Hindu rajahs and Moslem sultans. It was not stitched well.
Thus the question to ask in the wake of the Bombay terrorism just committed by Moslem proto-hominids is: will it precipitate India's unraveling? One place to look for the answer is far away from Bombay, called the Siliguri Gap.