Pretty sure not telling the nazi is still a lie. But an example of when it is ethical to lie.

You are either answering the wrong question, or are defining a lie based on some criteria I don't recognize.

Telling a Nazi there are no Jews in my basement is a lie. The only way it's not a lie is if there are, in fact, no Jews in my basement. But it is not wrong to lie to a Nazi.

A lie is still a lie, even if it’s told to a Nazi or if there’s an otherwise good outcome

Your point highlights the fact that lies are a tool. The intentional omission is a lie.

Judgment about the tool’s use is subjective.

Everyone uses this tool. Calling someone a liar is either calling them a human or it means you’re saying they use the tool more than they should which is yet another subjective judgment.

Ooh I like that perspective.