The basis of Indo/Pak partition was to separate the Hindus and Muslims which was under British rule in 1947 but Kashmir was independent country under Hindu King Maharaja Hari Singh.

Yes India is committing atrocities Kashmiris who don't to be under Indian rule but even West Pakistan also had commit atrocities on East Pakistan when they wanted independence and now Pakistan is committing atrocities on Baluchis who want independence for their natural resource rich Baluchistan.