Where do white Americans come from?

White Americans are all British. They were forced to move out at home for religious reasons and finally came to the United States to believe. At the same time, the United States encouraged migrants at that time. There is a movie called Ambition on Earth that tells such a story. At that time, in the western United States, you could buy land by race. It's almost empty-handed Do you think they will come or not? Moreover, going forward, the United States is a British colony, and there must be many British people there.