Yes, he makes that clear.
The 'radicalization is not so simple' piece explains further (surprised me):
"A survey of British jihadis by researchers at Queen Mary College in London found that support for jihadism is unrelated to ‘social inequalities or poor education’; rather, those drawn to jihadist groups were 18- to 20-year-olds from wealthy families who spoke English at home and were educated to a high, often university, level. Or, as the study out it, ‘Youth, wealth, and being in education… were risk factors’. Insofar as they are alienated, it is not because wannabe jihadis are poorly integrated, in the conventional way we think of integration, or because they because they are poor or lack resources."
RADICALIZATION IS NOT SO SIMPLE