There are many factors that make the abrogation the right move. We shouldn't be dividing a secular country for another Islamic state. Jammu and Leh should not be held back by religious based separatism. Even if Kashmir turns more violent, not giving into theocratic demands for another Islamic state is the right thing to do.
Maybe cutting off internet and house arrest of politicians was not the right moves, but neither was the status quo of perpetual autonomy and jihadi separatists.
Disclaimer, as I should add one. I'm no bjp supporter, and i hate the hindutva guys the same as I do the islamist crowd. After all, we call bjp making india a hindu pakistan. The word pakistan is derogatory here.