Humans treat "us" and "them" very differently.
With "us" we have much higher trust.
We're willing to interpret any ambiguity in the best light.
We see that sometimes we do bad things, but only because the context forces us to.
With "them", we have much lower trust.
Any ambiguity we assume is evidence of the worst possible explanation.
When they do bad things, it's because of their intrinsic qualities.
The fundamental attribution error shows up because we think about us differently than them.
Watch carefully for when you–and others–use the words "us" and "them".
Try to be in an expansive mindset of "us" whenever you can.
To constantly try to extend the boundary of "us", bringing in more disconfirming evidence to make "us" stronger.
After all, all of us are shared passengers on this spaceship earth.