Yes
Hindu religion
He was a hindu. He was a Maharashtrian Chitpavan brahmin.
Cast system, Dowry method, praying cow are best examples of taboo in Hindu religion.
Hinduism . He Was Praying To Hindu Gods On Pati Patni Aur Woh.
yes, hindu have a god
Krishna
Yes, Krishna is considered an avatar of Vishnu in Hindu mythology.
Radha (Devanagari: राधा) is the principal paramour of Krishna in the Srimad Bhagavatam, and the Gita Govinda of the Hindu religion. (Source: wikipedia) Radha Rani is the soul of Sri Krishna
During Indus civilization, the people formed a method for Praying and called it Hinduism and people who followed it as Hindus. Hinduism is oldest religion in the world
Krishna
Yes it is a bonafide movement. It is one of the Hindu religious Bhakti (Worship)movements which spread the message of Lord Krishna what he gave in Gita - one of the most reverred and respected holy book of Hindu Religion explaining the philosophy of Karma (Action or Deed).
Janmashtami means Birthday. In Hinduism, we celebrate the Birthdays of Hindu Gods like Rama, Krishna, etc. as a festival. Example: Sri Krishna Janmashtami.