How can you be certain the chi-coms would dominate?
No, I don’t think the Chinese will be able to get deep into India. For one thing, this is not the same Indian military that the Chinese have known. Secondly, there is no such thing as a “high ground advantage” on the Himalayas. The mountains are steep on both sides of the border. But that said, the US wouldn’t want to even risk a Chinese dominance in the Subcontinent.
Hot war or not, the first signs of things moving in that direction will see US military supplies pouring into India.
All I wanted to say was that the US will not have the option to sit back and watch.