Dalit Indians working at U.S. tech companies tell VICE News they try to hide their identities to avoid caste-based discrimination they thought they had left behind.     When Maya, a computer scientist, left India in 2002 at age 21, she thought she was finally leaving her home country's oppressive caste system behind. Maya is a Dalit, a group previously called “untouchables” in India’s caste system, which has structured Hindu society for centuries. Under the caste system, peop