Compare that, to the electorate that elected Reagan and how much it changed since.
Trump merely was talking about the death of an American prisoner under Chairman Kim, not nuclear weapons. We haven't left the pedal off the floor with sanctions.
I wouldn't be equating the old Soviet Union with the rogue state of North Korea. And to be fair, maybe the USSR was more dangerous. They were certainly more powerful.
I do think now, would be an opportune time to at least mention human rights in North Korea. See what the chairman says to that.