A wise man builds his house upon a rock, Bruce. Now try telling us what precisely would have happened if the US had not had the means to nuke Japan. Go on, try to play God. Many have before you. Anyone can "make a case" predicated on what might or might not have happened had such-and-such been or not been the case. Your scenario there, oddly, doesn't even mention guns at all, except for your rather forced last question. But I'll try to answer it. No I don't think they would have been safer. There would likely have a been a bloodbath with ricocheting bullets, guns seized and turned on the women and people shot dead on both sides. Of course, there are other possible outcomes. It doesn't always go like clean Hollywood, you know. There's no Take Two. So you really haven't made a case, have you?