Don't forget that Greece received financial help (IMF etc) so that creditors (big banks, really) could get their risky loans (with high interest rates) repaid, de-facto unloading the private-held debt on the European taxpayer.
This was much worse than a transfer union (where countries are supposed to help each other in times of crisis, alleviating suffering of the people): it was a direct transfer from the European taxpayer to the big banks - mainly French and German. This was neither in any way legitimated by the public, nor is a Eurozone mechanism. It was decided by the European financtial institutions because it made financial sense, so that the European financial system would not collapse.
Once this has been accomplished, it seems that Greece can be disposed of - risking even the disintegration of the Eurozone. Not much good can come of this.
So let's put this in perspective: Germany has benefited manifold of the european crisis:
- extremely low interest rates paid on debt, as opposed to what the Greeks are experiencing. Some of this is based on fundamentals, some of this is pure speculation, which has hugely benefited Germany and hugely in detriment of the Greek.
- big capital gains for the private German banks by investing in risky Greek bonds (help for the Greeks, which was good)
- no loses on the investments, thanks to international help to unload investments once the situation has started to go out of control. They have enjoyed the upside of their investment, and thanks to intervention by the European authorities, no downside.
And the Euro in general has been a big win for Germany thanks to its low exchange rate.
Now the Germans are risking all this in the name of economic Orthodoxy, but Orthodoxy exists to be broken in exceptional times, as it has been broken in the Eurozone several times during this crisis, as the US has broken it (quantitative easing), as the UK has broken it (buying bankrupt banks), as Island (out of the crisis by now) has broken it. Germany itself has broken it several times in the past - breaking the 3% deficit comes to mind.
And now we can not break it to restructure the debt of a country with a GDP lower than the 2% of the Eurozone's GDP? Give me a break!