
But I think this is the basic China-India problem; both China and India are going to be here and as long as China (and it plans to) holds Tibet they're both going to be on the border.
Until the caste system is resolved, any attempts to be friendly with India are going to have the constant sword of Damocles of caste-based politics threatening to torpedo any allies the Chinese cultivate.
Therefore, in Chinese policies vis-a-vis India, China should constantly keep caste and caste revolution in mind. Promoting China among Shudras and others who do not like the Indian caste system is more potent than simply fellating Brahmins, Kshatriya, and other Forward Castes. Hell, as a policy, this is way more potent than trying to promote regional insurgencies because those are merely regional insurgencies. Attacking through the caste system means that China is hitting India's weak spot and by allying with progressive castes, China is on the right side of history.