"Détente" is the answer you're looking for.
Answer:
Some Americans believed that it was God who wanted them to expand it's dominion and spread democracy and capitalism essentially across the entire North American continent. They also wanted to expand their territory, this caused them to drive Native Americans out of their land for the new settlers to settle in.
The enlightenment sparked ideas of natural rights and freedoms, when the British government had colonized the americas, there were no rights granted. The people educated in the enlightenment know thinkers like John Locke with his idea that everyone is born with rights, and resize they are not receiving these.
I think it was the founding fathers