Let's try to stay on topic. Hiroshima / Nagasaki is not the question.
I had this debate with the marketing people at Cox when I was designing decals for their Fw-190 and Bf-109 flying models. They objected because the Swastika was a symbol of evil, hatred, fear, and did not belong on their models. Nevermind that the airplanes themselves were weapons of evil, hatred, and fear just as much as the symbol carried on the tail.
My view is that as long as we try to bury the Swastika, we consent to give it power as a symbol of terror. The only way to destroy that power is to bring the symbol into the light and have it become so common it no longer evokes an emotional response. Education is also a great tool for destroying the power of a symbol. The Swastika, as many people know, was taken from Buddhism where it was a symbol of luck and fortune. Also, examples of it could be found in American architecture and design as late as the 1920's.
Those who forget (bury, ignore, delete, or deny) history are doomed to repeat it.
I include swastikas on my German airplanes. I am also Jewish. There you go.