Answer:
Prejudice
Explanation:
This has been a problem for colored Americans for hundreds of years
massacres of native Americans in the manifest destiny, slavery of Africans ever since the 1600s started by the Portuguese plus another 150 years of racial inequality
The Chinese exclusion act banned asians from coming into america and was revoked years later. Europeans i dont really know though.but the others werent welcomed mainly because of prejudice.
