I think that Jack has Stockholm Syndrome now that I think of it. Its when you fall in love with a person who has held you captive. "Stockholm syndrome is a psychological response sometimes seen in an abducted hostage, in which the hostage can show signs of having feelings of loyalty to the hostage-taker, regardless of the danger (or at least risk) in which the hostage has been placed."(wikipedia) Its like Jack has completely thrown reason out the door, in order to blindly believe Juliet. And that quote that James said does make sense steph. Jack will now refuse to let anyone get to Juliet, he has abopted this role as Juliet's protector and will end up hurting everyone around him because of it.

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Because all we really need to survive is one person who truly loves us. And you have her.