India is violating international law in the Doklam Standoff. The Indian Army has entered Chinese/Bhutanese territory without the invitation of either. Bhutan has not endorsed the Indian intervention nor said that it was on their invitation. The Bhutan Foreign Office in its Press Release has admitted that Doklam is disputed territory, China claims it as Chinese. Where is India involved? The Chinese Army already controls the territory. Bhutan has not claimed a Chinese invasion. The dispute about the extension of the Chinese road further from Doka La Pass is at best a bilateral dispute between China and Bhutan, which according to treaties between the two countries, is to be resolved peacefully.
What if China were to enter Pakistan occupied Kashmir? What if tomorrow Pakistan were to invite China or the US Army into Indian Kashmir because Pakistan claims it as disputed territory? Would India like that? India keeps insisting that Kashmir is a bilateral dispute with Pakistan and that the US and China should keep out. So, shouldn't India apply the same principle to Doklam? Chinese troops have never entered Kashmir, China has respected the bilateral nature of the Kashmir dispute. But after Doklam, they might not want to.
China has not violated international law or Indian sovereignty by "building up" or supporting Pakistan, so this is irrelevant to the Doklam issue. The US has built up Pakistan even more, so why doesn't India lash out toward its "ally" the US? Will this justify India invading US territory? Should India unilaterally intervene in US disputes with third countries because the US has supported Pakistan? So why apply this principle to China?
India is pushing China in Doklam to help the US contain China. But the Chinese will never back down under this Indian Army posturing. And Bhutan, that values happiness, does not want to end up as a war zone.
India is not threatened by China or any expansionism by China, India is being puppeteered by the US to contain China to further US interests. India is the aggressor here, egged on by the US. India needs to partner with China for economic growth, and not play US war games. There has been no Chinese aggression against India for several decades. Even in Kashmir, China has not entered Indian territory.
India has entered territory that is admittedly disputed between China & Bhutan. So, the aggressor here even according to international law is India.