We still do not know the critical details of how (and when) he stored the root password he copied out of their password manager (encrypted in his own password manager? on his pwned laptop? in dropbox? we'll never know!) therefore the whole chain of custody is still broken.
Why are you copying a password out of a shared vault that should only be used in break-glass type scenarios? It's that's not planning for possible malicious action in the future, I don't know what is.
You can try and excuse it as having your own break-glass for the break-glass, but that's on the spectrum between irresponsible and incompetent.
Again, if the accusation is true, removing him was justifiable from any possible perspective you might have.
> Regarding Arko’s blog post about his removal, McQuaid [Homebrew Maintainer] told me it’s good that Arko is crediting other people for their contribution and that he’s following open source principles of community and transparency, but that “his ‘transparency’ here has been selective to things that benefit him/his narrative, he seems unwilling or unable to admit that he failed as a leader in being unwilling or unable to introduce a formal governance process long before this all went down or appoint a meaningful successor and step down amicably.”
The impression I have reading this is that they're going out of their way to make it clear they believe it was him, but aren't naming him because doing so would be accusing him of a criminal act.