This is a motte/bailey. Deporting people is not inherently a violation of human rights. However, when judges have to clarify that "detainees" must be provided water and toilets[0], I think it's pretty clear that their human rights are being violated. The significant objection is to that, not to any semblance of immigration enforcement.
> I think the ideal solution is to create a system where overstaying a visa is practically impossible.
I can assure you that you do not want this, it is predicated on a level of government invasiveness that would be unpalatable to both citizens and legal immigrants. Some abuse is the cost of many well functioning systems.
> However, since it has proven to be too practically difficult to negotiate comprehensive immigration reform for various reasons, the American left -- a left that I consider myself a part of -- has gone in the complete opposite direction for most of my lifetime. We have established an overt nullification policy that effectively facilitates folks ignoring immigration law.
It is somewhere between deeply misinformed and rhetorical malpractice to say this, pretending that the American right bears no responsibility for preventing progress on immigration reform and that there haven't been multiple attempts by the left to improve things here that were blocked by the right (including multiple iterations of DREAM and various attempts at asylum reform).
[0]: https://www.scribd.com/document/943713376/Broadview-TRO