It will be extremely violent if India cross redline. Great powers don't tolerate a hostile state on the doorstep.The intent of China seems to prevent and forestall any anti-China security alliance between India and US. Territorial gains is not their objective. All these actions, since last year, are a kind of warning signals for India to refrain from joining US, for containing China.
China may not be a superpower yet, but definitely Pakistan+China combined force are a much greater power than India.
Can India bet on US to save her when Pakistan+China take decisive actions against India?