@LakeWashington,
Indians are notoriously racist, and many Africans (and African-Americans) report being treated poorly in India. (Or in Africa, for that matter, where people of Indian descent form much of the merchant class.) That attack should be seen in that light, IMO. Had these students been white, Indian or Asian it may not have happened.
@raclut, India was never particularly safe for Indian women; however rape attacks on tourists were - and remain - relatively rare.