I am sorry that you have had to go through such things and I know its common in Delhi since that's where my college is. But honestly without knowing anything about me accusing me of being racist is just scandalous to say the least. I have grown up studying in Christian missionary schools which have quite a decent no. of people from North-eastern states and I have so many friends among them and have never mean to them.
Peace out and my only suggestion is plz think before typing something bcz you are simply not doing it.