http://www.sikhiwiki.org/index.php/Operation_Shanti
"A direct descendent of Ganga Dhar Kaul, alias Gangu Brahmin, a cook employed in the household of Guru Gobind Singh, her vendetta against the Sikhs was due to what her grandfather, Motilal Nehru, had told her father Jawaharlal Nehru. Motilal had justified the action of Gangu Brahmin in betraying Guru Gobind Singh's mother and his two young sons to the Mughals because, in his opinion, Guru Gobind Singh's creation of the Khalsa constituted a direct threat to Brahmanism. Indira Gandhi had her Gangu-Brahmin ancestry confirmed by reference to family records maintained by Pandits at the Mattan Shrine in the Kashmir Valley and the confirmation firmed her resolve to carry on her war against the Sikhs. Not satisfied with the result of Operation Blue Star, she planned another nefarious operation, on a much larger scale, codenamed Operation Shanti. According to Dr. Sangat Singh, the assassination of Indira Gandhi on 31st October 1984 pre-empted Indira's Operation Shanti all over India by a week."
No wonder why she was so hell-bent to destroy the sikh quam.