Put another way, where do you even start with such a person? He has visited Japan, and thinks the dropping of the two bombs is one of the greatest historical wrongs ever done to any people on earth. I don’t want to write a book-length email back to him, and I’m not sure that would do any good. Brevity is the soul of wit, and a short reply is likely to make a stronger impact on him than a very lengthy one.
There are some ideas already on this thread I can use. If anybody has anything to add, I’ll be profoundly appreciative. I’m going to be in and out, so I may not be able to thank Freepers as quickly as I’d like. So thank you in advance!"
Keep the reply as simple as possible, I'd go with what Walter would say to someone like him:
"Dumbass"