Basically the paragraph made them citizens. Although voting rights where still left up to states, meaning that in 1938 seven states where still getting away with just saying Natives can't vote.
some argued that forcing citizenship was treason, the Onondaga Nation is a good example of this.
while other like Charles Santee, a Santee Sioux, thought that becoming part of the bigger political identity while keeping there own was important.
although almost all natives distrusted the government as the us government has back stabbed natives before.