That depends on the degree to which the two groups compete for jobs. There are also positive secondary effects which reduce the impact (immigration reduces inflation and increases the overall market size). The employment impact of immigration on low-skilled workers is somewhere between slightly negative and slightly positive.
It also means that the people who are currently working at minimum wage jobs are likely to lose their jobs to the cheaper competition.
That depends on the degree to which the two groups compete for jobs. There are also positive secondary effects which reduce the impact (immigration reduces inflation and increases the overall market size). The employment impact of immigration on low-skilled workers is somewhere between slightly negative and slightly positive.