The only way to do that is to level the country, but we're not about to do that. That's because we in America have a tradition of protecting innocents - not slaughtering them.
Here's a reminder of those you wish to murder indiscriminantly: "Although some of the Iraqis are not happy with the presence of American troops, "the kids love us," Sheridan said. "The kids are great. The kids are the next generation and will be the ones who keep the peace."
Unless we exterminate them before they reach adulthood. Leveling a major city will certainly teach those kids how to grow into peaceful adults, eh? We'd better kill them for their own good.