My point is that humans can take anything and make a weapon out of it. How many were slaughtered by smallpox-infected blankets distributed to the the Iroquois by the British? How many killed to open the opium trade to China? Range of a weapon is irrelevant to how many it can kill -- ask the victims of Jenghis Khan or Tamerlane or Eichmann, or those dead by gas in WWI.

I can kill more by derailing a tanker car of chlorine than I could with machine gun -- or by flying passenger airlines into buildings.

It is the intent, not the weapon itself, that kills. A 'dud' bomb dropped on London will quietly rust away until it is excavated...humanity itself bears the fault of turning innocent things into weapons.