Earlier quoted context omitted.
There's another possibility. This guy could have been rather obnoxious about his views in the past and had been repeatedly warned. Then he wrote a memo that appeared to be professional but espoused the same views and was finally fired for it.
From what I have been told, he posted this to an internal list specifically created to provide a place for frank, open discussion of contentious, diversity related topics.
1) https://webcache.googleusercontent.com/search?q=cache:0O3ZRp... (cache version)