After losing the war against Japan and diplomatic failiure in 1908 and 1878, the Russia was vary of losing face again and thus unwilling to back down. And in France there was strong pressure to avenge the humiliation of 1870/71 right away.
There is a perception that Treaty of Versailles was horribly unfair to Germany. Considering the peace terms they forced on France in 1871, what they planned in 1914 and the eace terms they forced on Russia, it was almost lenient.