How does Ishi overcome his concern about bringing Majapa and Maliwal into the Yahi world?

Ishi is reassured about his decision to bring Majapa and Maliwal into the Yahi world when Majapa harpoons the first salmon. Ishi says that the fish coming to Majapa is a sign that the Spirits are not angry or afraid. The fish comes to Majapa just as it would have come to a Yahi hunter. After this, Ishi knows that it is okay for them to be there with him.