This kind of success story does not exist outside of the west

This. This is the completely unquestioned propaganda nugget that holds the whole belief system together. Who told you that? Why would you believe that?

Enormous, and economically successful countries like China, just have no immigrants, no refugees, and no social mobility? (not that the US has a ton, there's a lot of unacknowledged luck involved in this story too)

This story can absolutely happen in other countries. China even has a higher income mobility than the US. And if you look at the statistics, immigrants are actually disproportionately likely to be pulled down into the cycle of poverty that exists in the US, there's an alternate universe not so different from our own where this dipshit's parents had the resources to leave Iran, eventually landed in the US, and actually experienced downward mobility not upward, and rather than becoming exploiters themselves, hit a speed bump along the way like a serious injury or foreclosure or god knows what else and instead became destitute low-wage workers, who can't afford to live in (most of anyhow) CA, send their kid to law school to do unpaid internships, etc.

This person really has not considered that they aren't the protagonist of real life and most people's stories don't look like theirs