Thomas L. Friedman writes in the NY Times, June 20, 2007:
Why were both the Hamas and Fatah fighters wearing ski masks? (And where do you buy a ski mask in Gaza?) These masks are worn by fighters who wish to shield themselves from the gaze of their parents, friends and neighbors, for there was surely an element of shame that Palestinian brothers were killing brothers, throwing each other off rooftops and dragging each other from hospital beds. The mask both protects you against shame and liberates you to kill your brothers - and their children. In our society, it's usually only burglars, rapists or Ku Klux Klansmen who wear masks. The mask literally says: "I don't play by the rules."