The context was different. He responded to internal politics-discussion-board, and that was leaked many months later. The email in the OP is (from what we can s

The context was different. He responded to internal politics-discussion-board, and that was leaked many months later. The email in the OP is (from what we can see) creating the discussion. Also, in the end Damore's continued employment became political thing, so it was probably inevitable he had to go. But the form - especially the crazy doublespeak - of his firing was the problem.