You underestimate the impact of being rejected by a father. She was very attached to him and he decided he was unable to keep up with her and her mother. He failed as a father. He abandoned his family, and Federation, human, or otherwise he is still the one that should be held responsible.

[He finally takes a drink and after a slight squint, puts down the tankard.]

Whether or not what you did was necessary, you still had your friend murdered. You tried to maintain the Empire as it was through dishonor. And you know that you acted in dishonor, and that your honorable friend died in vain.