I think there is a core confusion and overreaction which has plagued the right or late. Illegal immigration is bad. Mass illegal immigration is worse. Unvetted mass illegal immigration of people who don’t share your values and don’t respect your country is the nut low.
I think the evidence for that is clear. But here’s where they overreact and lose the plot.
America is a country of immigrants. It’s the most prosperous country in the history of the world. People of disparate ancestry creating untold wealth for society, despite the parasites, corruption, etc. How is this possible?
Because the foundational axioms of the US (the constitution, rule of law, private property, etc.) were the best. You didn’t have India’s caste system, Europe’s strict class divisions, or the communist regimes. You had a system where the individual who applied himself could thrive (with notable exceptions.)
The solution to one’s country losing its core axioms upon which its prosperity depends is only to let in those who are willing to adopt them. You don’t need to worry about racial makeup or quotas, just values. You need to vet people, make the process simple bureaucratically but arduous in terms of demonstrating fitness. No vetting system is perfect, but a strong one will ensure the people who arrive believe in American values. Free speech, private property, civil liberties, etc.
If your religion or culture is antithetical to these things, and you are insistent upon it, that’s fine, but you’re not entitled to live in America. There’s no need to adopt the identity politics of the left. It’s just merit based and voluntarily.