"The subversive, activist Left has made common cause with the radical Islamists for no other reason than the old truism:the enemy of my enemy is my friend...Although their reasons are different, both want to destroy the United States and Western civilization..."
Words of profound wisdom. If we are looking for a motive for Berg's doings, that's where the answer lies. His activities were not commercial, they were idealogical.
Yes, I do believe Berg's motives were ideological. Everything that's become public about him and his Iraqi adventure leads to that conclusion, despite the fact that it ended so tragically.