Answers:
1. Immigration, “Illegality,” Crime, and Terror:
The most serious concern about immigration today is the fear that immigrants are bringing crime and terror to the new country. Recent anti-immigrant rhetoric by politicians has added fervor to this meme. Immigrants in general, and undocumented immigrants, particularly those from Latin America, are depicted as “rapis(t) and “violent criminals and murders,” whereas immigrants from the Middle East have been demonized as “terrorists.” Evidence suggests that immigrants are significantly less likely to commit crimes than comparable samples of non-immigrants.
2. Concerns about Integration
On both sides of the Atlantic, immigrants are feared for weakening social cohesion, diluting cultural mores, self-segregation, worsening economic woes, and for disloyalty and terror. In the U.S. a recent survey found that 34% of American adults reported that immigrants are making social and moral values worse. In the U.S., there are isomorphic concerns that immigrants, from Latin America in particular, refuse to learn English and self-segregate in co-ethnic ghettos where the second generation gravitate towards the underground economy, drug trafficking, and gang culture. Similar anti-immigrant narratives centering on self-segregation, lack of English language acquisition, and the flourishing of countercultural criminal gangs are echoed in the U.K. Many immigrants are said to fail to become fully engaged citizens. When they become citizens, they are accused of taking on citizenship for mere instrumental purposes (e.g. for economic benefits or welfare). Accusations of divided loyalties also center on the practice of sending money to family members remaining in the home country.
3. Economic Trouble
Opinion polls demonstrate that immigrants are now viewed as an economic burden. They are said to take jobs away from their native-born counterparts, depress wages, and exhaust social services. In the U.S., 50% of adults recently reported that immigrants are making the economy worse. Immigration is blamed for either causing or aggravating the unemployment problem. In the U.S., a common charge is that immigrants do not pay taxes and do not contribute to Social Security; yet they benefit from public services such as public education, welfare, food stamps, and Medicaid. The charge that immigrants hurt the economy, depress wages and abuse basic social services is, again, contrary to the empirical evidence. Indeed, the preponderance of evidence suggests that immigrants represent a moderate net surplus in a variety of economic indicators.
Ending: Sorry if it's long, I just wanted to get all the facts. I hope this helps!