I dont think she was anti-Sikh. As you said, many of the prominent armymen incharge of the ops and the President during that time was himself a Sikh. Hindus in general do not harbor ill feelings towards Sikhs. Even during the politically motivated riots, many Hindus saved the lives of their Sikhs neighbors and friends. Bhindrawala was at fault. In fact 90% of the Sikhs that live abroad are anti-India and pro-Khalistan. They see him as a hero.