Yes, there is an association and a Head of Diversity should be smart enough to not generalize based on this association; it's failure to satisfy the core requirement of the professional role.
Well it was published 14 years ago. He was probably in college or something when he wrote it. Not giving him a pass or anything, just pointing out he didn’t write in while in his current role.
He didn't clean it up when starting in the role, he damaged the (employer) brand he was expected to protect/develop as part of his role, he got re-assigned to a different role, which is arguably a reasonable consequence.