This article is completely off the mark. It is driven by popular sentiments and not facts. I do not know why these events happened; it could be that because one of their soldiers got killed, they killed two of ours. They mutilated the body, which is Taliban culture and since they are closer to Taliban, some of their soldiers might have similar views as Taliban. (I mean views on how to kill mutilate etc)
Having said that it is incorrect that Pakistan has not done anything and we should not move towards peace. By peace I do not mean become friends (unless if you have good conditions, why not), but try to have a relationship which is not hate. Getting out from hating each other to normalizing relations will take time. Both sides do not trust each other and at a drop of hat some people want to go back to fighting.
Now why I think Pakistan is working towards peace.
After 2008 26/11 attacks terrorist attacks went down considerably. I think Pakistan acted on its side, but what they do is they do not admit it in open. After 26/11 they did took steps that helped us but they never admitted.
I have also heard about news that they do not support Kashmiri terrorist anymore. You can see the effect their too.
So bottom line one of two instances do happen, we did kill one of their soldier too right. But it does not mean we do what this article suggests.
I still think we have a chance to peace and I disagree that Pakistan does not want peace. It maybe that some people their do not want peace but that is same on our side.