Let's take a look at the broader picture .... Germany exports the equivalent of about 40 percent of its GDP, this is an enormous amount. For comparison, the United States exports 10% of its GDP and China 30%. Germany's industrial production is much greater than what it can consume domestically. If Germany were even to lose part of its exports, the internal repercussions would be severe.
Germany needs to sustain full employment, this requires more than simply exporting products. In order to do this Germany uses its dominant position within the EU to drive polices that are beneficial to Germany. As an economic power (rather than a military or political one), the instruments set up by the EU are the only means for Germany to control EU members who consume more than half of all it's exports. Germany continually used these EU levers, free trade, regulations, the euro's values, and the banking system to shape the system to take care of Germany's needs - unfortunately all of these policies were economically destructive to the majority of other countries within the EU.
Germany does not want to to pay for what they see as Greek indolence and corruption. The narrative from Germany is that the hardworking, disciplined Germans are enduring the feckless and irresponsible southern Europeans. Furthermore Germany should not bear the burdens of southern European indebtedness.
The next stride in the German narrative is that northern European values are superior to southern Europeans. The southerners can not be trusted to successfully manage their affairs, only the more responsible northern Europeans can impose the discipline and hard-work by taking the southern Europeans by the hand and vigorously compelling the inept southerners down the proper path of austerity, no matter the local economic pain endured by the southern population.
The bottom line is this is what the austerity argument is all about. Who should bear the burden of the EU crisis?
At this point IMO it would be best for both Europe and Greece to remove Greece from using the Euro, forgive many of its debts, and re-capitalizing the country in new local currency with further internationally backed loans while easing off the austerity provisions greatly. The focus should be getting Greece's economy moving again while de-coupling it from the EU economic infrastructure but improving trade.