Why is Jace protecting Valentine? I can understand Jace still loving his father despite everything. Despite popular opinion, feelings just can’t be immediately turned off and on like a light switch. However, Valentine left Jace to rot in jail, and Jace is still protecting him?
Honestly, at that point, I would have been screaming about Valentine, and what he just did, to anyone who would listen! Another reason why all of this stupid: Jace is already under suspicion by the Inquisitor and The Clave. If they find out that Jace was covering up for Valentine, it would confirm their suspicions that Jace was in collusion with Valentine. The Clave would not hesitate to enact a harsh punishment or maybe even kill Jace.
This is not hyperbole, just look how the Inquisitor punished Hodge. Also, I would like to point how the Inquisitor put Jace, who is an underage boy, in a prison that is full of hardened criminals for just mouthing off at her. She didn’t have to put Jace through due process and a trial, she just did whatever wanted without any consequences. Jace knows all of this, and yet he is still protecting Valentine. This is both stupid and insane on Jace’s part.