Most Americans want a country that benefits Americans. High skilled immigrants:

1. Take jobs an American would otherwise fill, which would not be a problem except 2. The economy disproportionately benefits the capitalist class (billionaires). Bringing over immigrants to boost the economy doesn’t help the median American, and it creates competition for natives

I’m not undervaluing it. Im saying it provides no value for the majority of Americans. And this on a purely economic axis - social and cultural angles are arguably all negative.