I agree with Spock… Nehru was the dirtiest character in the politics of those times. His personal ambitions were the key factor which caused all the bloodshed.
Basically Nehru was a fascist, centrist, who wanted to become all powerful dictator with absolute power in his hands. He did not believe in any devolution of power. In his dreams he used to see himself as the Indian Stalin. Jinnah on the other hand in the beginning was never a separatist. He envisioned India as a federation with all powerful regions.
India actually started moving forward when they gave up Nehru mentality and started to come closer to the Jinnah model…!!!