The British media are outraged that Tony Blair still does not regret toppling Saddam Hussein. Pundits from left and right are aghast that the former premier, testifying at yet another Iraq war inquiry on Friday, offered no apology for his role in deposing a man who had repeatedly invaded his neighbors and massacred his own people by the hundreds of thousands.

We're not sure what real purpose the so-called Chilcot Commission—named for its chairman, retired civil servant John Chilcot—is...