If someone could find sources for this ridiculous argument I would think they would be easily dismissed. Sounds like revisionist history, probably with a political bias.
The assassination at Sarajevo gave the lascivious Wilhelm II (literally a student and friend of Bismark in his later years—a devotee) the excuse he needed to take troops south into Serbia ostensibly to support Franz Josef for which he was treaty bound to protect. Russia was treaty bound to protect Serbia and France was treaty bound assist Russia.
The idea that France would instigate a war at this time is ludacris. Their military leadership was totally corrupt (this was illuminated by the detailed ancillary investigations into the Dreyfus Affair) , starved of allocations for years, undermanned and ill-equipped (proven when they were attacked in 1914 and the French military had to comandeer the whole Parisian taxi fleet to ferry men to the front for lack of enough military transport and trains, weaponry from the 1870–71 war, and almost no machine guns.) and in no shape to combat a united, prepared, post Bismark Germany at the front or over oil in some far off desert or anywhere else.
The purely defensive and extravagant Maginot Line was built in order to economize on troops and guns by strategically placing both under bulwark protection in fixed positions. The Line was incomplete, had been under late construction for years due to hesitant allocations, and way over budget due to corruption. The French people did not wish to spend any more, even on their own defense.
The very reason the French government starved their military was because of the anti-war sentiment of the people over what happened starting in 1870. The memory was as close to them as the Viet Nam War is to us—only much, much worse.
The rash, egotistical behavior of the dilettante Emperor Napoleon III that got them into the 1870 war with Bismark, Napoleon’s capture at Sedan, the protracted siege of Paris and the resultant bloody conflict with fellow Parisians known as the Communards, political upheaval, deep economic depression, and the end of the Second Empire and the Belle Epoc—was still in living memory. Nothing short of a full-out threat of a million well-equipped, well organized German troops crossing the borders through Belgium to the north and on the Alsace-Loraine/French border to the east could get the French to fight.