When all the white immigrants came to Ellis island, did blacks look down on them like whites do Mexicans today?

Dear Ice cream man: The term Mexican is not a race but an ethnicity.Mexico is a country in north America,the peoples of Mexico(Mexicans)may be of any race.The present racial population of Mexico is 60% Mestizo(of mixed White European & American Indian ancestry),30% American Indian,9% White(of pure European ancestry,mainly from Spain,France,italy,etc.),1% Black.