They thought they were uncivilized. Many of them treated women poorly and had slaves. Some of them were violent and killed settlers. Many had drinking problems.
They wanted to share the good news that God had sent His Son Jesus to be born as a human so he could grow up to die to pay for our sins.
Step-by-step explanation:
The missionaries wanted the Native Americans to be able to go to heaven. They taught that a person could be forgiven of amy sin if they asked God to forgive them. They also taught that to go to heaven you had to believe that Jesus is God's son, that he died to pay for your sins, and that he was raised from the dead on the third day. The missionaries believed that if the natives would let Jesus into their heart, they would be happier and treat others better as well.