Rumor is it wasn’t even the Editor in question. Lucasfilms wanted him gone. It’s just his current work was with Marvel so they got to drop the hammer. And you can understand Lucasfilms being a bit more conscious of Brand Damage and financial loss being caused by unhinged creatives on Social Media. Particularly writers.
And no it’s not all Russian Bots. While they will never publicly admit it, Lucasfilms, much like Hasbro, knows exactly who their core consumers are, and sees what Damage idiots like Wendig are doing to their product.
Actually looking at how Wendig got shit canned, and how much it actually resembles the Aubrey Siterson mess, I would not rule out Hasbro playing a hand in this. Right now Star Wars is the most expensive Toy License. It is however nowhere near the most profitable. If Hasbro walks away from it Lucasfilms is fucked. The Mouse would really start shitcanning the lot of them. Mattel is not currently in good enough shape to reliably pick it up. And Playmates wouldn’t pay the high fees. So Hasbro has a lot of bargaining power. And If Hasbro demands that the pissing off and pissing on of the consumers stops now or else, Lucasfilms would look for the most convenient scapegoats. And boy oh boy doesn’t Chuck top that list.