I am confused about how you are getting from A to B there.
In terms of a hot shooting war with the West or coming to Taiwan's military aid, who knows if anyone would do it?
But in terms of seizing all of China's foreign reserve assets and imposing trade embargoes to destroy their economy? You bet people would do it. Without a second thought. It would instantly happen, and would be very bad news to an economy not self-sufficient in either food or energy, and with 40% of their GDP dependent on exports to the West.