The US is not like many countries in that it was formed by illegal immigrants, and not just immigration, literal genocide and land theft of the indigenous people.

That being said, all immigration policy is out of date. The world is connected now and the policies are an anachronism.

> How could a massive influx of people happening faster than a system can react

I don't agree that this is reality. Our system is not under strain from immigration. It's under strain because we spend our money on the military instead of improving infrastructure. It's also under strain due to wealth inequality and corporate friendly policy. None of which has anything to do with immigration.

> The US is not like many countries in that it was formed by illegal immigrants…

That’s a good argument for vigilantly enforcing immigration laws. Look what happens when you don’t.