Finding and preserving the truth about the past is more important than ever. Truth is under attack from all sides, with politicians moving the Overton window on lying, LLMs, the decline of centralized news, fake reviews and comment farms.
If the author meant to say "History is often wrong and surprisingly easy to set right with a bit of investigation," great, but "The past is not true" is an absurd and harmful statement. How would you feel if I hit you with my car and ran, or tried to overturn an election and then said "I'm not guilty because the past is not true"?