"Creation of Universe - Big Bang Theory" - central to Both Hinduism- Shiva Purana ..Sikhism - Guru Nanak ?

Guru Nanak never refuted Hinduism...He only refuted the corruption and the abuse of Hinduism such as caste system and animal worship. Guru Nanak actually wanted Hindus to pratice their religion more accurately and in tune with what was written in their books. His message was that Hinduism was far more intellectual than many Hindus understood.