No, dittany, I made it clear I wasn't talking about Deer specifically but about journalism generally, and tackling your point about a reporter's duty to be "objective".
In any case, presumably Deer didn't start out "having a stake in the outcome" of the Wakefield story? His role as "accuser", if you like, came as a result of his investigations.
Leonie, your comment on Deer's website is odd. The Wakefield story is clearly the one for which he is most well-known and the reason for most of the visits to the website, I'd have thought. Of course it would be prominent. That's just sensible web design.