Nobody ever said that the memo was perfectly conceived or written. If you're saying he overstated his case in the passage you quoted I would probably agree. But the standard for inviting a conversation is not a perfectly formed argument from the get-go, a standard like that would make it impossible to have a conversation at all. So I'm still not clear on what exactly he wrote that would earn him exile and banishment in the judgement of a reasonable person open to having a discussion on the topics he raised.