The goal of US union with China in 1970's was to weaken Russia (USSR at that time), when it's done then US tried to weaken China. Now India is the one of countries US relys to weaken China. But, once china got weakened, then US will set next goal to weaken India.
Why China a threat for India? To me, it's very simple because India see China as an enemy. the first is that India supported Dala Lama to split China since 1959, and till now India still the biggest support to Dala; the second is that India occupied China's land according to the ridiculous an...