Fwiw I buy the first draft excuse. She's got form for fuck ups. Possibly cognitive issues connected with her diabetes, but what the hell do I or any of us know? I think what ska invita said above was what she was going for, and it might have been better expressed in the second/final draft.
I don't think it was a very good point to make even if it had been made well because it was always going to have an oppression olympics tang to it, and it rankles to see a published letter that seems to claim Jews and GRT folk can't experience racism.
Yes, I don't think anyone's claiming her excuse isn't true - that she accidentally hit send on an email to a national newspaper, given her past record for incompetence. And I also don't think anyone at all can blame Starmer for getting rid of her immediately given that one of his main pillars when he got the job was to get rid of anti-Semitism. The fact that it's surely the end of her political career is a nice side effect for him though.