What are some effects on anti-immigrant prejudices?
I assume you mean what are some effects OF anti-immigrant prejudices. This is something you can definitely answer for yourself if you think about a few things first. For example, you must remember that prejudices towards any group are similar in nature. People think of the group as less intelligent, sometimes they think the people in the group are dirty and people often think the group is lazy. So ask yourself, what problems would thinking like this cause for the group? Would they have trouble finding work? What about schooling? What about making friends with those who are not like them? Do you think they would get paid well for their work? Do you think they would get the same service in restaurants and other businesses as people who were not of that group would? When you answer these questions yourself, you'll have the answer to your question.