For all the people screaming for a cross border escalation, do you really want an offensive without mopping and securing up the rear areas first?
Kashmir and Kashmiris, or at least a part of them, are part of the problem. As long as these radicalized/whatever people believe that they have the ability to get what they want, they will use whatever means available to them to achieve it, no matter the sacrifice involved, inclusive of suicide bombing.
The only way this ends is that their hopes and beliefs are snuffed out of them. For a long time, the Germans SS were considered to be invincible/fanatics. Turns out once your shatter the core of their hopes, they surrender as easily as the other doughboys.
A similar claim of absolute faith and suicidal fanaticism of the Japanese soldiers. Turns out once you smash them hard enough and long enough, hopes crumble and surrender begins.
Solutions exist, have existed for long. Question is, how far are we willing to go down that route? Reality is, we need to break them, permanently. Do we have it in us to do so?