Can the US military give Trump and Musk a tour of a target range (complete with buildings built as a target) then give them a front-row seat (as close as is safe) to a test of the GBU-43/B MOAB (yield of 11 tons of TNT)? Then let them tour the devastation after the MOAB demolishes the target.
After the devastation sinks in, point out that Little Boy (the bomb dropped on Hiroshima, 15 kilotons yield) had over 1000 times the yield of the MOAB and that the largest test performed by the US had a yield of 15 megatons, 1000 times that of Little Boy. It might take a lot to get it through their thick skulls that those weapons should scare anybody shitless, but that just might do it.
