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?
Terrorism isn't going away itself. One or both the nations need to take action on them.
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.