pretending that it is only "pro illegal immigration" people that are against what happened here is misguided at best, or purposefully manipulative and bad faith
If every new proposed law to combat „child abuse“ was well intentioned and actually worked, there wouldn’t be much opposition either. But since they are mostly an underhanded tactic to censor the internet, there is.
So to use this legitimate actually useful example of fighting illegal immigration leaves a very bitter taste.
My understanding is that entering without getting inspected is misdemeanor (or felony in some cases), but that's often not the case. Usually people just overstay and that's civil case. And because it's treated as a civil matter a lot constitutional protections do not apply (to clarify: some still do).
Whereas a stationary camera can scan the license plates of ~100% of cars that go past it and save that data for later fishing expeditions. And is cheap enough that we can (and have) blanketed roads with them.