Ha ha. Restraint is not an option when 50+ soldiers of said country get suicide bombed by a terrorist group known to be residing with impunity and immunity in the other said country. At this point, it's a wonder it's not all out war.
As Einstein said, lunacy is doing the same thing again and again and expect a different result.
Anyway, that expression is misattributed:
They don't let us live in peace. They try to attack us everyday. They wage a proxy war against us.
We are seriously re-thinking if their nuclear weapons should be taken into account anymore.
Fifty?
Five hundred?
Five hundred million?
As many as it takes? Or is there a limit?
What if the conflict kills five hundred people on your side, and fifty on theirs? Do you also consider that a good exchange?
Everyone who was killed in this attack was willing to die to kill innocent Indians, civilians included. So, from that standpoint it is a completely justified attack.
Terrorism isn't going away itself. One or both the nations need to take action on them.