Seems like a temper tantrum to me, even if the journalism is legitimate. It could very well be these claims are clickbait for the journalist to strike out on his own without the publisher.
I'm reading the emails and they seem to be perfectly reasonable edit suggestions (I'm a person that's familiar with the editing process)- it points out that the article is attempting to accomplish too much with evidence that is actually vague and suggests increased focus to critique that liberal media isn't holding Biden's feet to the fire. Asking for an article to be narrowed down in scope is a perfectly good suggestion as an editorial board, especially in news articles where too much stuff can make the article ineffective. Furthermore, the editor is nothing less than professional/polite, while the response is full of wild accusations like "What's happening here is obvious: you know that you can't explicitly say you don't want to publish the article because it raises questions about the candidate you and all other TI Editors want very much to win the election in 5 days."
I think Greenwald is probably right regarding his accusations in the email, but I agree that they weren't necessary to include, at least so early in the discussion process. He did seem to react unnecessarily harshly, before his email even received a reply.
As you say, he was the one who first began displaying the unprofessional behavior. He probably should have just sent like half of his follow-up email (the citations of the email compared to the article) and given them a chance to reply. But I also understand why he felt he was being unduly pressured and why staying there wouldn't have been wise for him.
> I'm a person that's familiar with the editing process
I am also very familiar with the editing process. I'm not saying that the editing suggestions are beyond what you would ever see in an editorial context, but I would never characterize them as "basic edit suggestions."
Much of the quibbling in the edits to me suggests ulterior motive, like the rejection of the idea that there has been "suppression" of the story (there obviously has).
And if you're familiar with the editing process, you'd know that edits are not always completely apolitical, I know people who have been asked to make edits for political reasons in major national publications.
I think it is hard to claim this is just equal editorial scrutiny, given the publication of multiple false claims around the Hunter Biden story (ie. "very likely to be Russian disinformation", etc.).
> the editor is nothing less than professional/polite
To me, I don't necessarily always side with the actor who appears to be more professional, though I do agree that Greenwald comes off as rude in the email.
Seems like a temper tantrum to me, even if the journalism is legitimate. It could very well be these claims are clickbait for the journalist to strike out on his own without the publisher.