Playing devil's advocate here. What if the Chinese practiced that? We would be totally sc***ed since we've outsourced most of our manufacturing and let them steal our technology and manufacturing processes, and even set those plants up for them, all to exploit cheap labor. 3M and its distributors are probably run by any number of 21st century globalists who have been educated to believe nationalism is evil and American patriotism is an outmoded ideal.
I would hope that the solution is somewhere in the middle; not turning our backs on other countries in need, but also being sure, as you said to take care of our own first. Hopefully that would be a voluntary thing and Americans would instinctively help others in need. Unfortunately the management of 3M apparently may need a government kick in the butt.
When this is over, hopefully many of those globalist, open border promoters out here will realize that brand of idealism has real-world consequences. To the extent practical, we should never be dependent on any other country for energy, food, water, medicine and raw materials. And when we do have trade for things we don't have, we should limit where possible to trade with friendly nations. China is not our friend.