Poverty = terrorism?

An upcoming book by Princeton economist Alan Krueger argues that perpetrators of terrorism are more likely to be upper class and well educated as poor and uneducated:

"Backgrounds of 148 Palestinian suicide bombers show they were less likely to come from families living in poverty and were more likely to have finished high school than the general population. Biographies of 129 Hezbollah shahids (martyrs) reveal they, too, are less likely to be from poor families than the Lebanese population from which they come."

Most studies regarding the links between poverty and terrorism are only in the initial stages. However, early indicators appear to show that conventional wisdom doesn't quite add up in this case.