Uh. 25% support military intervention in China? Which would, with high probability, escalate into a nuclear war? I guess this tells us how many of the polled Trump voters are totally out of their gourds.
I guess (it's just a guess, not an analysis) there's no real chance of the USA winning a war against China. China has a larger population, meaning they will have far greater human resources available to mobilize for war, whether to fight at the front lines or to produce weapons and military equipment.
With the current economic integration and direction of flows, the US can't afford to seriously damage China for the same reason it can't afford to seriously damage the EU.
Even just ceasing trade with the US would be catastrophic (for everyone, but specifically for the US) right now.
If there is no occupation of mainland soil it needn't turn nuclear. And it's not like the US or its regional allies have any interest in occupying PRC land.
I don't think that whether or not the US has an interest in occupation is a large factor in this risk. If the US attacked China, China would respond, guaranteed. That would lead to a full-on war. Unless the US backed down, a nuclear attack by one side or another doesn't seem unlikely enough.
I recall recent polls also showed that around 30% of Republicans would support Trump even if he was directly implicated in the Epstein files, and (in a separate poll) would also support abolishing free elections.