People who are against Pakistan and make Pakistan and it's destruction an issue for populist reasons are mediocre politicians at best. Their arguments are based on a few pillars
1) They did this so how can we act any better
2) The mistaken assumption that bad things happening to the PEOPLE of Pakistan is somehow a good thing for the rest of us
3) Opposing every single person of Pakistani origin and holding them accountable for the policies of the government and shadow forces in the establishment is somehow a good idea.
First of all, you don't make peace with your friends. You make peace with someone who was an enemy and now, if not a friend, is not directly harmful to you. A constant back and forth never leaves an opening for peace.
Second, A vibrant economy in Pakistan, with an educated population that goes away from religious zealotry, towards science, education and free trade, eliminates the root problem without anyone having to incur human loss.
Even the educated population of Pakistan is fed up of violence, religious bigotry, anti-science attitudes. These people are our greatest allies. They are represented in the form of artists, athletes, statesmen and stalwarts of literature. They need our support if the root cause of problems stemming from Pakistan are to be destroyed.
If you attitudes do not change or have room for some form of peace, then you are an obstacle in equal measure to the Taliban or other jihadi groups.
The alliance with Afghanistan, the fact that Pakistan watches old allies shift away from it, the great progress happening in India naturally creates an environment which is now ripe to create ties that gradually give incentive to the Pakistani powers that be to move in the direction of modernity and away from extremism and chaos. If a helping hand is not extended at that crucial moment and a tone-deaf, age-old argument devoid of any new thought is not presented, then that opportunity is wasted.
Along with a stick to punish bad behavior, a carrot must be offered to reward the good. If not, then your political acumen is seriously underdeveloped. An enemy can be destroyed in many ways and one of those ways is to make the enemy aware that choosing the wrong options will hurt them even without militant action from their opponent. If you are making someone aware that they are driving towards a cliff, it also helps to guide them towards the right course.
Another advantage of this action is it leaves your image clean and makes the global audience aware that your actions have always been towards reconciliation and peace, but since those actions are rebuffed, you have no other option but to take a harder stance.
Take the example of Republicans vs. Democrats. Even after constant obstruction and underhanded techniques, while successfully navigating those waters, democrats constantly offer willingness to cooperate, Republicans are exposed for what they are and there is no doubt as to who the guilty party is. However, if the dems, like some groups within India, constantly adopt a belligerent stance, they are playing the game by GOP rules and it is easier to be judged by the same standard.
Ask yourself if your words and actions provide a solution. If, as a direct result of your actions, a problem is resolved once and for all, then those actions are meaningful. No matter how great your words sound to your intended audience, if they don't resolve anything, they only add noise and a distraction to those attempting to solve the problem. If the Pakistan problem is solved, once and for all, or even mitigated to the status of minor irritant, thanks to better relationships, greater emphasis on education and a move away from zealotry and ignorance, then a large part of the political brainpower, manpower, resources and media attention can be focussed on issues more relevant to progress