.THE MAN in the wheelchair, driven along by three companions, resembles some other patient in the Ibn Sina medical facility in the West Bank. Therefore does the woman in a headscarf apparently bring an infant. Others, in scrubs, look like clinical staff. But moments eventually they take out rifles and eliminate three Palestinians. Within 10 moments they are gone. Israel says it removed three revolutionaries throughout the raid on January 30th and warded off a primary attack which impended. However disguising combatants as medical staffs most likely breaks international law, which prohibits "perfidy". What is that criminal offense?