Comment by mananaysiempre

The results of the opposite of these policies (as practiced by many other countries) are, generally speaking, worse. Undocumented immigrants are necessarily an economic underclass, but whether they will be a lawless underclass is a deliberate choice that pretty much entirely boils down to whether you make it unsafe for them to turn to the police. (I mean, the first part, creating an underclass at all, is also a deliberate choice—that of having immigration laws of the post-WW2 kind—but any alternatives seem to have been thoroughly pushed out of the Overton window.)