I have a very strong sense that we’re not going to agree, but one point.
The most important consideration is probably whether the information is partial or tells the whole story… Journalistic ethics does not require publicizing every piece of partial information. Quite the opposite.
The tacit premise here is that one already knows what the story is and can decide beforehand what information is ‘partial’ and what tells the ‘whole story’.
I’d argue strongly that this information in itself was newsworthy — the fact that Trump has at times paid a lower tax rate than such figures like Obama and Bernie Sanders is a great stand-alone story (assuming that one doesn’t have an agenda which aligns with Obama and Bernie).
Again, not expecting you’ll agree with any of this, just offering you the courtesy of a reply.