By Paul Taylor BRUSSELS (Reuters) - The latest paroxysm of Greece's debt crisis has exposed growing rifts in the euro zone which, unless addressed soon, could lead to the break-up of European monetary union, the EU's most ambitious project. With central and east European states growing more assertive and the Dutch and Finns facing mounting domestic constraints, a compromise between euro zone leaders Germany and France, increasingly hard to find over Greece, is no longer sufficient to settle the problems. There are so many stakeholders with divergent views that crisis management is becoming ever more difficult.