Shiin isn't looking to fix his losses with force, he's looking for revenge plain and simple. The sad thing is he doesn't understand who's at fault for the death of his family. He just wants someone to blame. Orb has always been his enemy since his family died before and after they joined the EAF, it just made it easier for him to kill somone when they joined the battles. He's never said if he's ever had any ideals on freedom or war ending, he just wants a never ending battle. He blames Kira for killing Stellar and yet doesn't want to take any responsibilty for returning her to the enemy that put her in a mobile suit in the first place. If you know the EAF can't be trusted then why return her. Shinn is a little immature. He isn't protecting anything or anyone. I'm a soldier in the military and I know from being in Iraq, if a soldier doesn't have something he's fighting for or someone to protect then he's no longer a soldier, he's a murderer.