The Washington Post won’t say why it cancelled a six-figure ad buy calling for Elon Musk to be fired, but it’s likely the same reason the Post insisted Musk wasn’t Nazi-saluting on Inauguration Day, and why the paper killed its endorsement of Kamala Harris: because that’s what Jeff Bezos wants.
Bezos doesn’t give two shits about Musk and isn’t “looking out” for him - he just won’t air criticisms of Musk that also apply to himself.