ISIS terrorists resorted to an ruling by Ibn Taymiyyah to justify burning the Jordanian pilot. It always in the world of those terrorists comes back to the ruling of Ibn Taymiyyah. This skilled fanatical polemicists remains the one most dangerous theoretician for all those terrorist Jihadi groups and his body of work is so vast that he has something for every occasion. And who promoted this kook and who spread his word in the Islamic world? You guessed it. It is the Saudi regime in the 20th century.