[Gengis Khan]

"Can someone explain to me India's motivation to war with Pakistan here? "

India's motivation to war with Pakistan could be anything from dismembering Pakistan so that India's eastern flanks are no longer a threat. Moreover a smaller Pakistan = a less dominant and a less belligerent Pakistan.

But the most important reason was.....(and what the article didnt mention out of political correctness) was that the East Pakistan genocide was actually a Hindu genocide. It was the time when Hindu population of East Pakistan plummetted from near 20% to 14% almost overnight. Hindu majority India with a large Bengali population (my folks included) wont have take that lying down even if that meant risking a military confrontation with the US. If its not India comming to the aid of the Hindus, who would?

Now do you see the motivation ?

[Gengis Khan]

India's motivation to war with Pakistan could be anything from dismembering Pakistan so that India's eastern flanks are no longer a threat.....[to establishing regional dominance.]

Left that one out :)

[Cronos]

Hindu majority India with a large Bengali population (my folks included) wont have take that lying down even if that meant risking a military confrontation with the US. If its not India comming to the aid of the Hindus, who would?

Quite correct. And also to note -- the General who led the war on the Indian side was a Parsi/Zoroastrian, and the chief Indian war architect was a Jew and there were many Christians and Sikhs in the army. What I'm saying is that India as a whole would not tolerate the slaughter.