Final answer:
Race was a major factor in the treatment of immigrants by their host countries, which often resulted in discrimination and limited opportunities. The extent of racial discrimination varied by country and circumstance.
Step-by-step explanation:
Race was a major factor in the treatment of immigrants by their host countries. In the late nineteenth and early twentieth centuries, immigrants who were perceived as different due to their race or ethnicity often faced discrimination and prejudice, leading to unequal treatment and limited opportunities. For example, Jewish people and Italians, who were more recent immigrants, often faced discrimination and anti-Semitism. The extent of racial discrimination varied by country and circumstance, as some immigrant groups were more accepted than others. Overall, race played a significant role in shaping the treatment of immigrants by their host countries.