Earlier quoted context omitted.
What parts of that email are so objectionable?
Below email is the quoted statement: ts originator is a toxic loonytoon who believes "show me the code" > meritocracy is at best outmoded and in general a sinister supremacist > plot by straight white cisgender males." I think open source has a serious problem in the sense that there are a lot of projects headed by single, rather abusive and obsessed individuals. And moreover, where a stream of obscenities in an emai…
Individuals, who, let's not forget that, are the reason the projects exist in the first place, and who may feel more attachment to the projects than others. That they react more strongly to the impression that some other group is trying to take over their project, often years or decades of their life, and destroy it (by their standards) is understandable, I think.
And also, let's not forget that those seeking control via CoC are often equally abusive, they just strategically limit their abusiveness to Twitter & co and keep it off of official mailing lists to be able to say "I always stayed professional (here, while I was backstabbing everywhere else)".