Kidie didleir brother should've died

I didn't get why they tried so hard to save him He assaulted a child and then started a war. Death penalty was deserved

I was wondering why more people weren't agreeing with this! After everything he did (assaulting his little brother and then later strangling him at another point in time, attempting to kill his own father, and then helping to start a war), him being returned back to his kingdom so his father could do whatever with him, so that they could stop the war, is honestly such a good deal. I adore Louie, but him wanting to save his brother, after everything he did, is just frustratingly stupid.