It is a big fallacy propagated by TV that Parshuram later did not teach anyone other than Bhishma or Brahmins. Why don’t people read mahabharat? Even those who have read want to deny it. There was other student of Parshurama who was famous and a Kshtriya and he was Rukmi. Rukmi who had original Vijay Dhanush which he never gave to anyone.
https://www.quora.com/Who-trained-Lord-Parshuram
https://www.quora.com/Who-trained-Lord-Parshuram
