If you are not aware please read the following article to get a complete picture - https://en.wikipedia.org/wiki/Exodus_of_Kashmiri_Hindus
Why are you resorting to name-calling? Please read the guidelines again.
Abrogation of 370 happened because it was a temporary provision, allowed regressive practices like Triple Talaq and Child marriage, prevented legitimate inheritance. There are many other reasons that Amit Shah stated in his address in the Parliament. I request you to watch it if you haven't.