Buddhism did not evolve from Hinduism, nor even from its predecessor Brahmanism (calling the place it came from India is a also a bit of a stretch, but to a lesser degree):
> We come to the conclusion that early Buddhism as a whole has developed independently from
Brahmanism, with selective influences from Brahmanism and non-Vedic spiritual movements,
altering and utilizing these influences for its own growth against its religious competition.
* it may have actually been reacting first to Zoroastrianism and its idea that the absolute Truth and Lie can be known: https://press.princeton.edu/books/paperback/9780691176321/gr...
* even if not, then it was either a reaction against Brahmanism (https://ahandfulofleaves.files.wordpress.com/2012/02/how-bud... (PDF)), or at the very least an independent development: https://www.academia.edu/63732680/Early_Buddhism_and_its_Rel...
> We come to the conclusion that early Buddhism as a whole has developed independently from Brahmanism, with selective influences from Brahmanism and non-Vedic spiritual movements, altering and utilizing these influences for its own growth against its religious competition.