I suppose fire bombing Germany, and bombing Poland, Italy, Austria,Belgium,Netherlands,France, Denmark, Japan, fighting room to room through Manila, bombing/shelling countless islands in the Pacific, having direct orders to US Navy submarine captains to sink Japanese cargo ships known to have American and allied prisoners locked in the hulls...was mean to people who meant us no harm.
It certainly was. Hundreds of thousands, possibly millions, of people who personally meant us no harm were killed by these policies.
They may or may not have been necessary for us to win the war, but there is no question they killed a great many who we had no real reason to kill.