> Shouldn’t every country have the right to mutually assured destruction?
not really. If you didn't already have nukes, but your regime is much against the west, i'd argue that it is the right thing for the west to deny it from them. I am attaching no moral argument to this - simply a practical, utilitarian argument.
The reason russia has free reign to invade ukraine is _because_ they have nukes. Iraq invaded Kuwait just the same, but was pressed back in a war - imagine if they did have nukes; it would mean that Iraq could've acted with impunity, and they'd control all of the oil resources that was Kuwaits'.