Most immigrants, especially those with family members here, are hard working, productive individuals - and would be even more so if they didn’t have to live in the shadows. Splitting families is a heartless, mean-spirited thing to do, and does no one any good. The U.S. needs immigrants for a lot of reasons - richer culture, innovative ideas, positive cultural additions, etc. there are truly very few downsides, and the ones that exist could be easily controlled. Those who say “get in line” have zero knowledge of the process. It simply would not be practical in most of these cases.