Final answer:
Geronimo's attitude towards non-Indians degraded due to forced relocations and broken promises by the federal government, including his final surrender and subsequent imprisonment.
Step-by-step explanation:
What changed Geronimo's attitudes towards non-Indians were the series of forced relocations and broken promises by the federal government. After unsuccessfully trying to live on a reservation, in 1885, Geronimo led a group that fled what they felt was akin to a prison only to face pursuit by federal troops. This pattern of betrayal and desperate attempts to regain autonomy culminated in his final surrender under false pretenses of being given a new reservation, only to be shipped to a federal prison in Florida. Not only Geronimo but many Native Americans underwent forced migration, loss of lands, cultural disruption, and were subjected to Americanization policies which sought to assimilate them into American society forcibly.