Two points for you to consider:

1. Say President-elect Trump would follow through on his original policy of deporting 11 million undocumented immigrants (he's rolled that back to exactly what the Obama administration is already doing by the way.) Who is going to replace their role in the economy? Am I to believe that supporters of these policies are eager to fill the roles in society undocumented immigrants are filling? What are your opinions about places like Alabama that have passed strict policies against undocumented immigrants? Do you think that's working well for them (it's not.)

2. Nobody is "pro illegal immigration" but when it comes to "cracking down" on the illegal immigrants who are here, many of them with natural born children,  how do you avoid having a giant bureaucratic system that racially profiles U.S. citizens? How do you avoid eroding the constitutional rights of people who would get caught in that net? Images such as the Japanese internment camps come to mind.