After the Hiroshima bombing, Russell Kirk wrote to a friend in 1945, “We are the barbarians within our own empire.” Richard Weaver wrote the same year, “The atomic bomb was a final blow to the code of humanity.”
Who were Kirk and Weaver? Two of the most important conservative thinkers of the 20th century.
…In 1959—a decade-and-a-half after the use of the atom bomb—National Review editorialized that, “The indefensibility of the atomic bombing of Hiroshima is becoming a part of the national conservative creed.”
So America’s premier conservative journal was essentially saying that abhorring U.S. use of the atom bomb was conservatism proper. [link]