And yet, the destructive potential of those weapons is such that the people of the US have decided their ownership should be federally regulated, and those of more modern manufacture not legal at all for private ownership.
Thermonuclear weapons have caused fewer than 400,000 intentional human deaths since the very first atomic bomb was tested in the deserts of New Mexico in July of 1945, but we sure as hell have regulations and laws about those now don't we? How many Americans have been slain on our own soil with guns since the end of World War II?
And we're not supposed to at least minimally, sensibly regulate them and who can legally get their hands on and operate them? This isn't a Second Amendment issue and it never has been. It's a common sense safety issue dealing with devices specifically designed to smash, destroy and kill things and with rapid, lethal efficiency.