“‘Some of the foreign fighters may not return as terrorists to their respective countries, but all of them will have been exposed to an environment of sustained radicalization and violence with unknowable but worrying consequences,’ Richard Barrett of The Soufan Group wrote in a report called ‘Foreign fighters in Syria’ this summer. So what is it about ISIS and its uncanny ability to recruit Westerners? Here are five methods the group employs:”
Source: Why is ISIS so successful at luring Westerners? – CNN.com