America will be a lot poorer if the foreigners would not do so much of the work. This claim is in the same ballpark as saying we should not be allowed to use machines. I am really astonished that there are many people who obviously are able to read and write, but somehow don't understand economics 101.

There is a shortage of American workers willing to work for internationally competitive salaries. This is similar in Europe, by the way. Industry associations claim that there is a shortage of skilled workers, whereas in reality there is only a shortage of skilled workers willing to work for low-ish salaries. On the other hand, paying everyone higher salaries across the board would have its own economic consequences.

But they make a lot (most) of their money outside of the USA, so why restrict them to doing the work only in the USA? That will not only start a trade war, but give an unfair advantage to foreign companies (like SAP) who can open up R&D offices in the USA, Germany, or wherever they want.

America First is as old as the Great Depression years ago. They always fizzle out in the face of economic realities.

Right, then go get out of all those juicy international markets and see the majority of revenue evaporate.

There are a lot of companies; Americans have a spectrum of views, as do corporations. In addition, both individuals and corporations are capable of talking out of both sides of their mouth (or just plain lying).

Not sure what TOS you are referring to, but regarding downvotes maybe you should read the top comment on: https://news.ycombinator.com/item?id=36673613