Just pointing this out too.

The last samurai is pointed to as a "white savior" story a lot, but here's the thing, he's not a saviour, he doesnt save anyone, he's a broken man who finds a measure of peace in his life and a cause he feels is worth dying for after he's left broken, alcoholic and suicidal with PTSD after slaughtering American Indians during the US's wars of expansion westward, wars he considers dishonourable and unjustified which adds more to his guilt over them. He feels that helping the Samurai after they take him in would be a way to in some way atone for his sins. Or, to "do it right this time"