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.
The non associators wereThe Colonists who broke away from the Mother Country. The ones who did stay with England were known as the Loyalists (associators)
A summary of the actions of the many aggressive regimes in Europe of the past several centuries would include mostly religious "holy" wars and a desire for territorial expansion.