Oradour is somewhat of an anomaly, in that, in dealing with the population of France, the German occupiers of WW2 were often very "correct" and rarely took mass reprisals (although many many hostages from areas perceived as hostile, like Brittany, were sent to work in Germany alongside youths conscripted into the more or less forced labour service, after 1943). Very few incidents even approaching this type occurred in France, which is why this large village is kept, unrepaired, as a monument to the (in France at least) rare SS atrocity.
The author was arrested more like kidnapped) by French Customs near Lyons, carrying a carload of gold including (he says) bars stamped with the letters "RB" meaning "Reichsbank". He was told, he says, by he who provided the gold, that that person, a Jew terrorist with the "Maquis" and "Resistance", had buried the gold after an ambush in 1944, that the gold belonged (if you like) to an SS General who had misappropriated the non-Reichsbank part of it and that the massacre was an attempt by a few SS officers to recover that gold. The official story is different: the SS General was friendly with an officer caught and tortured to death by the Maquis rabble. The massacre was a reprisal for that.
The author was sentenced to 2 years in a French prison for attempting to smuggle gold, but none of it, officially, was Reichsbank gold.
The author's story (this book) was (is?) banned in France, he says. The (mainly recently recruited and Alsatian) SS troops indicted after WW2 were, after a long trial, sentenced variously to death or imprisonment but all save one NCO, were released in 1954 after a year, following a law passed by the French legislature. The SS General was sentenced to death in absentia but lived until his death in Germany in 1971.
A very interesting story which might or might not be true in some or all particulars. What strikes me, though, is that the town itself still stands as a monument to the 400-odd people killed that day in mid-1944 (and who until then had scarcely seen a German officer or soldier), yet to take two examples, the British shelled and bombed Le Havre in 1944 and killed 35,000 people; the Americans bombed Cannes (that's why it is mostly postwar in architecture) and killed, it is said, 100,000 French civilians. Truly, what we call "History" is in the hands of the victors to a large extent...