They're in front of the camera because they want to be, telling stories about life in the Shin Bet's moral and operational shadows for reasons that clearly include self-justification the settling of scores against those who ignored their advice or turned against their agency but, just as clearly, a desire to enunciate their passionately held beliefs.
WSJ: Gatekeepers: Mideast Revelations | Bullet to the Head | Stand Up Guys | Film Reviews by Joe Morgenstern