Some Native Americans easily converted to Catholicism.

This is false, it was very hard for native americans to convert to catholicism because they believed very strongly in what they had been taught and what they 'knew as facts'. They had grown up with their beliefs and catholicism just wasn't real (wasn't true) to them, it was almost made up. Many Native's would keep their beliefs hence why a lot of them got killed and they had issue with many leaders etc ...