Pakistan politics is governed by those who think they need to show they are more anti-India than their opponents. This whole thing is a result of keeping masses from asking key questions on development, education, etc.
By creating a religion based educational infrastructure, which is controlled by extremist thoughts, the politicians have ensured that those at the lower strata of society are always in the clutches of religion. Since these folks do not get better avenues to fulfill their aspirations, they are directed towards extremist actions and promised the glory of heaven. Have you noticed any leader of these extremists themselves undertaking any such suicidal attacks? Why don't they want to enjoy the 72 virgins in heaven?
Indians are generally soft, and easy going. We tend to forget and forgive too quickly. While this is good at individual levels, it is a dangerous thing if our policy makers too get carried away in the emotions of the moment.
I believe Pakistan is a failed State and is used as a money making machine by its dictators, and politicians. If they are not serious about cleaning up militants and terrorists of ALL hues, the regional powers like China, India and Russia will have to take drastic measures.
I hope the sweet nothings remain so, and the policies are driven by more objective, and impassionate considerations.