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 Americans are usually very generous in assisting in other crises,
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,
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.