Wikileaks reported in the past that US ambassador - in a cable message - referred to NE India's Manipur as similar to 'colonial state'; India's governors - usually retired army officers - also considered their tenure in NE as 'punishment'.
Recently, Prime Minister Modi's visit was boycotted by Mizoram's civil societies, who took the minimal duration of Modi's visit as insult and sign of being negligent of the land and its locals.
REFERENCES
https://www.theapolitical.in/india/mizo-ngos-boycott-modi-visit