Fact: Trump has stated that a lot of immigrants are criminals.
Fact: It is currently hard to enter the US legally as an immigrant. Not only is there paperwork involved, it is EXPENSIVE. See here: The Ultimate Guide to the U.S. Immigration Process Now, if these people are immigrating because it’s hard for them to earn money in their home countries, how are they supposed to get the filing fees, which can easily cost thousands of dollars?
Fact: A current part of the legal immigration process is a background check.
Suppose the President-elect is right. Suppose that a large part of illegal immigrants are criminals. That means that, if criminals are excluded from entering the country, those who DO enter will constitute a much smaller amount. A manageable amount, perhaps?
So. Step up enforcement of the border. But make it easier for people to enter the country legally. Get rid of the expensive filing fees. Set up immigration offices in different countries, to help citizens immigrate legally. And keep the background check in place. Take fingerprints when people are applying for citizenship, to check against both the US criminal database and the database in their home country (and possibly all of South America and Mexico). Then check their fingerprints again when they’re entering the country, to make sure they match the prints submitted with their application. Keep criminals OUT with enforcement, but let workers and their family members IN. You will have less “illegal” immigrants, less human trafficking, and less crime.
Also, I support the mass deportation of criminals. But I think other immigrants should be allowed to stay, or at the very least given the option of EASILY applying for legal immigration status, either while here (which is preferable) or after they are deported (which should be done while keeping in mind that some people left their home countries because their lives were in danger). It should be simple to differentiate between the criminals and the non-criminal immigrants. Just take their fingerprints. If they refuse to have their fingerprints taken, deport them.