So you think the US blockaded Cuba and depth charged a Soviet nuclear submarine in 1962 for the same reason?
Or maybe, just maybe, the USSR crossed the US's red line. Every major country has red lines. China's is very clearly and very obviously Taiwan. Russia's was Ukraine. Hitler staged his armies in Ukraine, the Japanese attacked China from Taiwan. Neither country is going to allow the next big power of the day, to set up shop in those regions.
And the US is basically doing everything it can to provoke war by crossing those red lines. This is Ukraine all over again. US needs to speed up delivery of weapons to Taiwan, US general says