The lyric from the old pop song that proclaimed "Don't Know Much About History," is a label that could well be applied to many Americans.

But despite the fact that surveys occasionally tell us that many college seniors place the Battle of Gettysburg as happening sometime in the middle of World War II, the study of history isn't merely for those hobbyists who like to pose as Civil War or Revolutionary era soldiers.

Even as we debate the largely unpopular wars being fought with Islamists in Iraq and Afghanistan, the focus of another crucial debate currently raging on the bookshelves and television screens is one over the merits of something that most of us had long thought was not debatable: the wisdom of the American involvement in World War II.

THE NOTION that there is any debate at all about the war the United States fought against the German Nazis and the Japanese imperialists seems absurd. Surely, no reasonable person could dispute the necessity of defeating Hitler. But an argument there is, and it is one that is gaining momentum.

In recent months, two works questioning the justice of the fight against Nazi Germany have vaulted onto The New York Times bestseller list: Human Smoke by Nicholson Baker and Churchill, Hitler and the Unnecessary War by Patrick Buchanan. Baker is a quirky novelist who has penned books about a wide variety of subjects including voyeurism and a fictional attempted assassination of President George W. Bush. Buchanan is the longtime far-right pundit and television personality, and one-time independent candidate for president, whose views were once rightly labeled as anti-Semitic by the late William F. Buckley.

Their books are as different as the authors.

Baker's effort is the effort of a more accomplished prose writer (despite its fictionalized conversations involving world leaders it is sold as a work of nonfiction), while the former GOP stalwart Buchanan retains the punchy style of a former political speechwriter. But they are aiming at the same target.

Both take the point of view that, while Adolf Hitler was a bad guy, he was provoked into launching a world war that he had not planned on. Instead of heaping blame on the Nazi monsters who launched the war and carried out unprecedented war crimes as well as the cold-blooded murder of six million Jews, each see Winston Churchill as the real villain of the war. Had Hitler been left alone, they both assert, the Holocaust would not have happened and the world would be a saner place today.

Though Baker's concludes his faux narrative at the end of 1941, he clearly sees the Allies' tactics in fighting the war as indistinguishable from that of the Germans. In his brief afterward, he dedicates his book to the tiny band of American and British pacifists who did everything they could to prevent their countries from resisting Hitler.

The theme of Allied perfidy is also echoed in a new PBS television series that features the work of a far more respected source than either Baker or Buchanan - Scottish historian Niall Ferguson.

In his 2006 book War of the Worlds, he damned the Allied bombings of Germany as war crimes and dismissed the notion that it was in any sense a "good war." These views are repeated in the PBS series of the same name which began to be broadcast this week.

While Ferguson is, unlike the perverse Baker and Buchanan (whose ideological roots are in the anti-Semitic "American First" movement) no apologist for Hitler, he, too, derides the notion that the American and British victors were liberators because they used some of the same tactics as their foes.

Ferguson deplores the fact that the West did all it could to help Stalin win but, as with many of the other ironies put forward in a series that seeks to change the way we think about the great conflicts of the 20th century, he fails to provide a reasonable alternative to the dilemmas faced by Churchill and Franklin D. Roosevelt.

And that lack of context is the problem with all of this revisionism. Buchanan quotes the historian and Cold War strategist George Kennan as asking whether the West would have preferred in 1950 to be still facing the relatively reasonable Germany of 1913, rather than having suffered through two world wars, and the rise of the totalitarian menaces of Nazism and Communism. Yes, that would have been preferable. But given Germany's dreams of hegemony, it was never an option.

Similarly, the notion that more "Munichs" in which the West would have acquiesced to Hitler's seizure of Poland and the rest of Central and Eastern Europe would have left him satisfied is pure delusion and unjustified by any serious historical research. The problem was that the West woke up too late to the dangers of Nazism. Most people in Britain, France or the America of the 1930s didn't understand the stakes involved nor were they ready to fight even if they did.

BUT THE real point of these rethinkings of history is not so much to vindicate Hitler or even to trash the indispensable Churchill, without whose vision and courage in the darkest moments of the war, Western civilization may have truly perished.

Rather, the point is to call into question the far more immediate notion that an aroused and prepared West must still be prepared to defend its values against contemporary totalitarian foes.

Irrespective of the shortcomings of George W. Bush or the debates about Iraq, it's hardly a secret that what Buchanan and Baker are truly gunning for is the willingness of post-9/11 America to wage war on the Islamists who wish to take up Hitler's war on Western democracy.

Just as he blasts the opponents of appeasement for forcing the West to fight a war against Hitler that he thinks was more trouble than it was worth, Buchanan opposes the struggle to fight the Islamists or even to extend American help and NATO membership to the fledgling democracies of Eastern Europe.

But these new appeasers are just as blind - if not malevolent - as their predecessors in the leadup to the war against Hitler. And that is a point whose importance transcends the battles of the scholars and the pseudo-scholars about history.