There is an even simpler argument, though... "Violence begets violence."
or, if you prefer... "An eye for an eye makes the whole world blind."
click for article
"The history of wars fought since the end of World War II reveals the futility of large-scale violence. The United States and the Soviet Union, despite their enormous firepower, were unable to defeat resistance movements in small, weak nations -- the United States in Vietnam, the Soviet Union in Afghanistan -- and were forced to withdraw."
"So if an action will inevitably kill innocent people, it is as immoral as a deliberate attack on civilians. And when you consider that the number of innocent people dying inevitably in "accidental" events has been far, far greater than all the deaths deliberately caused by terrorists, one must reject war as a solution for terrorism."