This is why the construction of neo-Buddhism as some kind of rebellion against Hinduism (and not having "gods") is so hilarious.
Buddhism is Hinduism for export. It is the same foundation.
He called himself an Arya (oops "Aryan invasion") and his teaching the Arya Satya (but translated, in this case as "noble" not Aryan truths.😉)
Wherever Buddhist teaching went it adapted to local culture. In India too. What came after can be called Hindu-Buddhism.
The monastic elements and institutions were largely destroyed by those who hate "but(buddha) parasti."