"History is not true. You can change history. The actual factual events are such a small part of the story. Everything else is interpretation."

OK, you've discovered post-modernism.

Next step is to avoid its pitfalls.

The actual factual events are infinite and one is exposed to a small subset to interpret. That does not mean you're allowed to make up, distort, and selectively ignore facts to suit whatever narrative you'd like to push. You need to construct the narrative in good faith, based on the best possible set of facts you're exposed to, and adjusting it when you're exposed to new facts.

Unless you want to organize a cult or a totalitarian regime, in which case go as crazy as possible with the narrative. People love it.