It's great that we are actually talking to these guys. The situation in nagaland in the 80s and 90s was absolutely brutal. Lets see what the outcome will be. Personally i'm not that hopefull. Neither side is willing to compromise on the issue.
One major reason why this separatist movement is been raged for over 50 years is because of the church. Not the catholic church mind you but the American funded evangelical churches. These pastors believe that Nagaland is christ's country in a sea of non-believers. Like Israel, it has been chosen by god to guide the rest of the world. This bs propaganda is going on unchecked and brainwashing a significant section of the population. The only people who are trying to counter this is the Catholic church. But considering that at least 95% of the population in Nagaland is protestant, they obviously won't succeed.
What people don't know is, the slogan for the separatist movement for a long time has been "Nagaland for Christ". The NSCIM cadre carry a rifle in one hand and a bible in the other. Right wing religious nutjobs. They come in all religions whether Islam, Hinduism, Christianity and Sikhism. One more reason why India would be better of without religion altogether.