Among all territory disputes, everyone just claims they are the victim. This is common sense. It's not rational choice to believe words from either side. What you should do is to analyze who would make a profit from the event. I believe India is the trouble maker in LAC. Here are the reasons:
1, US, the only super power, is doing all its best to contain China now. China is focusing its resouces to deal with all attacks from US and its pawns(Australia Canda for example). It's definitely not a good time for China to start a new front line with India. On the other hand, right now it's a golden time for India to take advantage of this China-US tension.
2, Modi has to resort to nationalism to minimize his prolitical pressure from his failur in the Covid-19 war.
3, India wants to impress US how important it is in the containing China game. In return India hopes to gain more profit from US.
4, India knows the west media would always blame China as long as there is anything related to China. India's invasion has zero moral loss(at least in the West mind) and adds one more “criminal evidence" to China. This is "killing two birds with one stone" move for India.
