You are obviously oblivious to the massacre of Sikhs after Indiras murder, they were butchered in their thousands.
This is usual with the Indian nation. When Indra Singh was murdered by her Sikh assistants, her own community(Sikh) got massacred by the BJP people- right wing extremist. Sikh wanted a separate state- they wanted to bring old Punjab which was the one they had under Mr. Ranjeet Singh- from Peshawar to Patna and Indian PM refused to give that hence there was separatist movement.