Katniss has a softer and more empathetic view of war, while Gale has a more aggressive and warlike view.
Katniss has a more empathic view of war, she believes that all enemies who repent should be spared and those innocent people should not suffer any kind of reprisal by their adversaries.
Gale, on the other hand, has a more aggressive view. For him enemies should be punished even after repenting and that no one is innocent in the midst of a war.
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