Earlier quoted context omitted.
The difference is the number. Workers on temporary visas make up ~1% of the labor force in the US. And a large chunk of them will eventually get citizenship or permanent residency and qualify for benefits later in life. Countries like Singapore and all of the Middle East meanwhile rely on a revolving door of cheap immigrant labor. In the extreme cases like Qatar 95% of the working population are on short term visas.…
The US also has a huge pool of undocumented immigrants who don't get any benefits, don't pay into the social security system, and can be paid below minimum wage (because officially they don't exist). Any time this labor supply is threatened, the construction and agriculture industries rise up (and probably sponsor all those massive protests you see in the news).
Most Americans do not need to be paid to dislike fascism.