Landres and colleagues are grossly underestimating the charitable giving of Americans. As recently as last year, the New York Times noted that 95% of Americans indicate they give to churches and other charities. Other studies have found that the percent of Americans NOT giving has gone up from 6% to 12% during the recession.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: American Jews donate early and often, but usually not to Israel