Let us begin with a provocation, for nothing less will do: if courage had a capital in Pakistan, it would not be in Rawalpindi’s General Headquarters. It would be on the deck of a civilian vessel headed toward Gaza, with five Pakistanis—including former Senator Mushtaq Ahmed Khan—who have dared to place their fragile, mortal bodies in the path of an Israeli war machine notorious for its appetite for blood. These men are not naïve. They know very well the grisly fate of flotillas past, gunned down in cold blood by a state that shoots aid workers with the same ease...