Native Americans, in general, were unsuccessful in overcoming the negative aspects of European policies. There are several reasons behind this including:
1) Europeans desire for land- The desire of Europeans (Spanish and English especially) to expand their land and territory caused severe problems for Native Americans. However, they struggled to stop these people from encroaching on land due to their advanced weaponary. Due to the guns, ammunition, and technology, European settlers were often able to defeat Native American groups.
2) Forced religious conversion- Many Native Americans were forced into new religious beliefs (like Christianity). If these individuals tried to resist, they could be met with violence. With this in mind, many conformed to these religious practices as a means to prevent violence.