When economic conditions are difficult, people tend to be less generous and protect themselves; the question of solidarity doesn't mean much to them at that time.
I would urge all countries and any group that can help to assist. The Americans have been very generous in assisting in other crises. Now they have been dealt a serious blow,
The American people who have always been the most generous in responding to disasters in other parts of the world, have now themselves suffered a grievous blow,
The Americans are usually very generous in assisting in other crises,