Nuclear threats against enemy countries have been overused so much by Ruzzia being a tough-guy and more recently by Iran and Israel that they are now meaningless. When America legalized gay marriage in 2015, Iran shat a brick and fantasized about nuking us, but no nukes flew. Iran and Israel routinely threaten each other with each of their 3 warheads, but no nukes have flown. Ukraine started buying tanks, ordering F-16s and attacking Crimea, but no nukes flew. NATO recruited Finland which Ruzzia said was an attack on them, but again, no nukes flew. Ruzzia started directing its legions of keyboard warriors to salivate over Alaska, but no nukes flew. An Israeli politician fantasized about the country committing hara-kiri by nuking Gaza, but no nukes flew. Whenever someone fears that WW3 will start, I remind them of that fact.

I hope we can build one that can use hydrogen fusion like the sun; such an energy source would make an excellent power source, even if small

You were the exception not the rule unfortunately