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Who are famous American people whose ancestors were immigrants such as Sylvester Stallone?
Sylvester Stallone has been a successful actor for many years; starting with his first movie roles in 1970; and has some very good movies to his credit. (and admittedly several bad ones too)
Welcomed because they were needed - but never treated as equals until they had proved themselves good Americans.The ones with complicated foreign names would be re-named in English before they'd left...