Power kills and impoverishes life. Billions of people live without freedom, In the worst of these countries, they live in fear and insecurity. They are literally slaves, bought and sold, or the effective slaves of their governments. Expression is who you are you basically hiding your identity and holding your opinion against you.
The immigrants contributed significantly to United States history from the period 1900 to 1940. Immigration was widely spread in the North while the South (aside from slave immigration) remained mostly American born citizens...about 14.5% of the population were immigrants and it was a huge force for the labor industries
Americans did not want to be taxed by those they did not elect. "no taxation without representation".