From the headline, one might assume he directly edited or locked the page when he just commented on the article's discussion page that it should have a more neutral tone.
Statement from Jimbo Wales: This message is from me, Jimbo Wales, founder of Wikipedia
That's not just another comment; it's an official statement from the most powerful person on Wikipedia.
Wales goes on to say, "As many of you will know, I have been leading an NPOV working group and studying the issue of neutrality in Wikipedia across many articles and topic areas including “Zionism”. While this article is a particularly egregious example, there is much more work to do."
In other words, an official body is watching and studying what you are doing, and policy actions may follow.
Finally, Wales does not accept any possibility that other points of view besides his own may be valid - not addressing many prior discussions. His belief is an assumed premise, and he demands ('asks') people to take actions on the basis of his beliefs. If you read the discussion, he continues that position.
That doesn't make Wales wrong or right, but he didn't 'just comment ... that it should have a more neutral tone.'.