Jamie's not going to jump Predator or otherwise get physical with them, but he may get a little mouthy and be initially reluctant to cooperate with them. Is that the sort of thing that would incite violence, or just really overt attempts at picking a fight with them?

ETA - Or will the trust and optimism he feels due to his Hope alignment extend to NPCs as well as player characters and make him more willing to tell Predator what they want to know?