Infiltrating terrorists groups is a very difficult thing to do. They need to see many years of contact with the group before they will trust anyone.
I can see a student that has already made contact with some middle eastern types in college continuing his identity in order to keep the contact.
This isn't the cold war, where James Bond gets assigned a new identity for every mission. Terrorists just don't operate that way.
I wouldn't doubt that the only way we will EVER get a spy into their network is to recruit someone already in the group, who will continue to use their own name. If Berg made contact with these creeps in college, then he'd continue using his own name.
Yes, but if he was CIA he would have been issued a new passport that didn't have his visa stamp in it from his visit to Israel.
What you've got to remember is that "covers" are designed or sought out for the group being infiltrated (by both sides).
American, Jewish, and telecommunications expert does NOT lend to infiltrating an Al-Qaeda cell cold.
But American, Jewish, and telecommunications expert does lend itself to convincing Americans to let you do work inside their secure compounds.