But, what if it's a small nuke, a teeny tiny tactical nuclear weapon? Nothing could possibly go wrong. /s

[usonian]

From a Hacker News commenter:
https://news.ycombinator.com/item?id=47676516

Once the First Use Taboo is broached, nuclear explosives will be used for everything. Wherever you have a spare 100kg of payload and a hardened or area target - nuclear explosives, from a weapon effect perspective, are simply too good not to use, once the cat's out of the bag. It'll be like machine guns in the early days of WW1, but with each bullet the most powerful device made by Man.

The thing about sociopaths is that they want to visit the hell inside of them upon everyone else.