The correct answer to this open question is the following.
The refusal to accept New Mexico as a state says a lot about what people at that time thought it meant to be American. Thet showed a racist behavior because the United States Congress did not accept the New Mexico's application to be a state of the Union. The reason? Congressmen had many doubts about the kind of people -mostly Native American Indians- that could be part of the United States.
Yes, I see contemporary parallels or similarities with present events. Recent racists events have taught us that racism practices are very ingrained in some parts of American society.
It is necessary for the government to establish provisions
for naturalization and immigration because the provisions allow for a more
centralized immigration process thanks to the naturalization of aliens. The
mandate for centralization made the process uniform throughout the country and
the courts processing applicants became more organized.