In message , ian maclure
writes
I thought it was some papal representative at Carcassonne
and the quote was:

"Kill them all, God will know his own"

I've read it as Beziers, during the crusade against the Albigensian
heretics. The Papal nuncio was being asked how the crusaders should tell
the faithful from the heretic and settled for the simplicity of total
extermination.

--
He thinks too much: such men are dangerous.
Julius Caesar I:2

Paul J. Adam MainBoxatjrwlynch[dot]demon{dot}co(.)uk