What's coming out of your mouth is VERY different what your generals are telling Modi.......they are talking the same language to try to involve Pakistan in a conflict, and they've been doing that for months now, JUST so stop or sabotage the economic progress being made by Pakistan.
I will always speak the reality out. I don't know (YET) if the attack today was really a Pakistani group or an Indian coordinated attempt to build a case for a conflict. But I do know that Indian generals are itchy to stop the economy related progress as Pakistan has over $ 60 million people young and either educated or getting some. Which would put serious labor competition with India. That India doesn't want to tolerate, not woman wants to look second to the younger one in the batch. Everyone wants to keep their edge, in this case the economical edge is worth trillions in a couple of decades!!!
BUT, what you are discounting is that what or how would Pakistan respond. Even your generals have told Modi that, that anything is possible anywhere to do, what they know for sure is that there would be a response, it would be heavy and it could go out of control by a large proportion.
So I say, investigate, find out who's behind it and ask for the criminals to be handed over. Whether that's Pakistan or the Sikh community sitting a few miles away.