The problem was that these powers were resisting an inevitable outcome, the Germans were too strong after uniting for their neighbours and with their central position they were going to dominate Europe it was never a matter of if only of when.If you refer to the territorial provisions imposed on Germany, there are many reasons which made France had no choice and which made that Germany would not have been satisfied anyway.
The french then used to say, the problem with Germany is that there are 20 million germans in excess. Germany was much stronger than its neighbours in 1918 and, although defeated, had not been devastateThis by the war since the war was not fought on her territory.
This coupled with an enduring militarism in public mind made Germany a permanent deadly threat for its neighbours. In other words, the real deep source with german revanchism post 1919 was not the treaty of Versailles but the fact that Germany just did not tolerate It had been defeated because It considered defeat as counter-nature.
Other reason is that Prussia deliberately chose France as an hereditary enemy to found united Germany. The second Reich was built on the fake french threat (fake because France had been denied the possibility of being a threat since 1815 and that Britain had made it perfectly clear that It would not tolerate any crossing-over of the red-line) as a way of forcing reluctant german States into a united Reich.
You want proof of this just look at the eu, Germany is its heart.
Prussia had no choice, France was the number 1 continental power a united Germany was going to challenge that position, conflict was inevitable.