Actually, the phrase appears to be somewhat older:
This phrase comes from a perfectly genuine mediaeval anecdote. In 1209, during the "Albigensian Crusade" ... in Southern France, the forces of Orthodox Catholicism had been besieging the city of Beziers ... for some time. Finally they breached the walls of the city and prepared to storm it. The commander of the crusade, Simon de Montfort, Earl of Leicester, pointed out that not everybody in the city was a heretic, some of them were good Catholics, so how should they treat the inhabitants when they captured the city? A monk who was actually present at the siege recorded the answer of the Papal Legate to the Crusaders, Arnaud-Amaury, the Abbot of Citeaux, as "Neca eos omnes. Deus suos agnoscet." ("Kill them all. God will know his own." ) So the Crusaders followed his advice and killed everybody they could find in Beziers.
So what happens after you exterminate all Pakistanis?
listen, i’m not advocating that the Indians should do this . . . i’m just giving you my opinion on what the Indians may do if Pakistan does not eventually get its act together.
It was only a few short years ago where the world stood on the brink of a nuclear war in SE Asia . . . and the event that led to the stand-off was a terrorist attack on an Indian parliamentary building that was tied to the Paki ISI. All i’m saying is you could see a repeat if this event gets tied back to the Paki govt.
Read a lot about de Montfort “The athlete of Christ” when I was younger.
No more beef vindaloo. I can live with that.