Considering it's generally perceived as an anti-war song, surely it's more appropriate than not in the current climate?!
Obviously there are two competing arguments. One is that it was a horrific thing to do, to drop an atom bomb that killed up to 250,000 people. The counterargument is that it ended the war and saved millions of Japanese and American lives. I know that Paul Tibbets, the pilot, was absolutely sure that he helped end the war and save lots of lives by killing so many people with one bomb. So it was really an exploration of the moral dilemma and my ambivalence to the morality of doing such a thing.
“I chose to sing about the plane rather than the bombing itself. I was very proud of myself for writing the line, ‘Is mother proud of little boy today,’ because it had multiple meanings. The Enola Gay was Paul Tibbets’ mother’s name. That was a fairly bizarre thing, to name a plane after your mother and then go and drop an atom bomb. Plus, the bomb was codenamed ‘Little Boy’. When people said, ‘How can you write a cheerful-sounding pop song about such an atrocity?’ one of the defences I used was, ‘Is it worse than naming the plane after your mother and dropping the atom bomb?’
As a bit of a side bar, Swap Shop banned the playing of the song at the time because they interpreted it as promoting homosexuality.