In WWII we dropped leaflets telling people to leave their cities before we dropped atomic weapons. We told them exactly what we had and what we were prepared to use and that they needed to leave if they wanted to be avoid being killed in the blast. Why? Because among other things Americans do not seek to kill the innocent. There will always be collateral damage, and that can’t be helped, but we are one of the remarkably few nations on Earth (Israel and Britain are the only others ones that come to mind) that go out of our way to warn the innocent to get out of the way.
And anyone who suggests that American should just kill the innocent as standard practice has nothing in common with any traditional or value in America.