Whenever you try to understand how a situation unfolded, it gets filtered through your own beliefs and biases.
This is equally true when you're trying to figure out what happened during the Roman Republic, if you're trying to make sense of what's happening with a particular part of the economy, or if you're analyzing a conflict you got into with another individual last week.
Even if you've got the exact same facts, you'll focus on them to different extents and assign them different weights. It's an easy way to score a laugh when you point out a fundamentalist who is so committed to a position that they ignore entire sets of facts inconvenient to them, but we all do a lesser version of that all the time.
It's hard -- really, really, really hard -- to even get somewhat outside of your narrative and to understand something from another person's point of view. Even fully bearing this in mind, and trying to do it, it's still near impossible.
But it's worth trying to do, anyways. It's worth constantly remembering. Your story about what happened is heavily filtered. Maybe it's more right than the other person's -- you obviously think it is, which is why it's your story -- but their story would make a lot of sense if you were them.