The French weren’t innocent in fault for WWI, either; they were still pissed about having their asses handed to them in the 1870 war with Germany and being humiliated.
They were teaching “Revanche!!!” in the grade schools for forty years prior to WWI, so those fires were already primed and stoked for conflict.
Technology wade the slaughter industrial.
Studies by German scholars show that the initiatives pushing Austria to issue ultimatums and invade Serbia came from the German Kaiser's staff.
The alliances then took effect, with Russia mobilizing to defend Serbia and Germany mobilizing to invade... France!
The French responded, and the Brits, and the Great War was on.
But the plot was hatched in Berlin and pushed by the Kaiser's High Command.
David Fromkin: "Europe's Last Summer, Who Started the Great War in 1914?"