This is outright wrong.
Your initial opinion above may be true, that this action is provoked by US intervention, and cross-border strikes are the wrong way to deal with the situation, that's your opinion, but this here isn't true.
Pakistani people supported Afghans with an arm and a leg for a very long while in the name of Muslim brothers and sisters. But the growing hate sentiment you see is entirely due to the actions of Afghans themselves.
I mean what do you expect when they believe Pakistan to be their Israel, believe the people to be "daal khors", "porkis", "porkistan", "munafiqs", "heera mandi ki aulaad", and push for sanctions?
The term "namak haram" started being used after this.
Of course Indians are loving this and joining in, but this is not some artificial Indian produced sentiment, it exists.