Who's critiquing the critics?

I can understand if Roger Ebert doesn't care for the movie The Hitchhiker's Guide to the Galaxy. I can understand if he's never felt the need to read any of the Hitchhiker books. But this line in his review, I do not understand. This line causes me pain:

"The movie does not inspire me to learn lots more about The Hitchhiker's Guide to the Galaxy, The Ultimate Hitchhiker's Guide, The Salmon of Doubt, The Long Dark Teatime of the Soul, and so on."

Is he trying to irritate the fans? Is he being deliberately obtuse? Or can he not muster the ability to do even the most rudimentary of research on the subject?

I'm not one of the obsessives who cares whether or not their particular favorite line from the book is included in the film. I'm not that invested in the whole thing. I'll probably see the film, but if I don't, that's fine, too. But come on, Ebert! You're a journalist, man. One who presumably has access to the internet. Here, look how easy it is:

The Ultimate Hitchhiker's Guide is a compendium, not a separate entry in the series.

The Salmon of Doubt is a posthumously-published "cornucopia" of Adams' essays, letters, and other short pieces, including chapters from an unfinished Dirk Gently novel.

The Long Dark Tea-Time [note the hyphen, Ebert! Couldn't be bothered even to get the title right, I guess] of the Soul is again Dirk Gently, not Hitchhiker-related.

You don't have to be a fan, Ebert, but at least have the courtesy to not insult and belittle those who are fans by deeming the entire subject unworthy of even the simplest, most fundamental of research.

And in case you feel I may be misinterpreting Ebert, that he was talking about Adams' entire bibliography, not just the Hitchhiker books, the line above directly follows up on an earlier suggestion that some novices to Adams will "understand that a familiarity with the books is necessary, read one or* more of the Hitchhiker books, return to the movie, appreciate it more, and eventually be absorbed into the legion of Adams admirers." (Emphasis mine.)

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EDIT: That used to read, "one of more of the Hitchhiker books". That typo was copied directly from the Ebert review. Damn, not only does Ebert need a factchecker, he also needs a proofreader.