People outside of the U.S. are our brothers and sisters but,
our first priority is to ourselves, family, neighbors and country in that order.
Then we can help beyond our duties to others.
The author is correct in the article. 4 I would emphasize that a reasonably regulated free market is what we should seek rather than the current capitalism.
Otherwise, it will be an endless and pointless debate whose only offered answers are more than it is now and less than it is now. Lots of platitudes, IOW, and no actual moral reasoning.