Pakistan isn't a helpless country. It has the means to reply in kind and much worse. If India escalates this it will get a very firm response.
This has been in the making for a while. No proof has been presented. India has a habit of doing this after a while. The truth is that Indian occupied Kashmir is a major problem for India. Indian Hindu fanatics are trying replace the local Muslim population. The Kashmiri population won't sit idle. This is an internal Indian problem and blaming Pakistan is just an easy scapegoat. The problem for India is that Pakistan is militarily no slouch. If anyone believes that Pakistan is an Iraq, Palestine or Afghanistan they need a wake up call. Pakistan is Pakistan. There is only one reason why India hasn't gone out full against Pakistan all these years. The Hindutva fully understand the repercussions.