When was is it that India has lost so much of its morality?

Back ancient times in India, cows, brahmanas, women, gays, s, ed, and intered were all a respected and very protected. Today, these people (and animals) seem to have lost all value to the Indian population because they face harment, persecution, and violence violence and government doesn't seem to care. So when did this all begin? Was it the Muslims? The British? When did India's moral values grow wings and take off and never return?