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It's medieval. It sounds like Malleus Maleficarum or something.
Funny you should say that. The Catholic Church made a similar descent from the 7th to the 11th centuries. Brian Harrison documents it in some detail, if you're interested.
http://www.rtforum.org/lt/lt119.html
Of course, the ultimate '24' style tough guy remark of all time was uttered by a Catholic Inquisitor during the Albigensian Crusade:
Caedite eos! Novit enim Dominus qui sunt eius!
"Kill them all! God will recognize his own!"