Earlier quoted context omitted.
All nations are at least a bit nationalistic. If they weren't at all nationalistic, they wouldn't be nations. Restrictions on the free flow of people are not a binary decision. Countries in the Schengen Area which have almost completely given up the ability restrict movement between their territory and 25 other nations are not restricting the movement of people as much as say North Korea which doesn't even let most o…
By that definition the US is the least nationalist country on the planet. 20% of the world's foreign born population lives in the US. https://en.wikipedia.org/wiki/List_of_sovereign_states_and_d... And it seems to me that it's that lack of "nationalism" as you've defined it that's helping US-based companies exploit cheap labor in (or from) other nations.
And of course, restrictions on freedom of movement can't be summed up exclusively with number of immigrants. There are many countries that are much, much easier to get into than the US; people just don't want to go there as much. And of course, nationalism isn't exclusively border control. That is just one nationalistic behavior.