Let us ask the native Indians for a true perspective. They have lived the history and the alienation of their own race and culture.
Their story would have been vastly different, it the Europeans had come, wanting to be Indians. The settlers had another agenda.
If someone truly has something worthwhile and life changing to contribute, shouldn't they first want to contribute to their mother country? If they seek a better life, shouldn't they change the conditions of their home country? The USofA has already been made.