There are deeper lesson here.

First, a lot of the immigrants that people complain about now are only immigrants because the US fucked up their country. Venezuela is the poster child for this. There are consqeuences to destabilizing other countries for American corporate interests.

Second, companies like illegal immigration. It allows them to pay people sub-minimum wage in horrible working conditions and if the workers every complain, you just call in ICE to deport them. You pay a small fine for employing undocumented migrants and the next day hire a new batch. You probably even have avoided paying wages to the deported workers.

Third, a lot of attention is paid to people who sneak into the country. This is the minority. Also, "entering without inspection" (that's the legal term) is a civil infraction (unless you've previously been deported; then it's a crime), much like a traffic ticket. You technically aren't a criminal if you do this.

But the majority of undocumented migrants are visa overstayers. They get a legal visa to come to the US, often a visit visa, a student visa or a temporary work permit (eg J1, H2A, H2b) and just don't leave.

And to answer your implied question, it's not about illegal immigration. It's about white supremacy and the exploitation of labor under capitalism.