I'd have said the Germans have made more than enough contributions to cover "repairations" - I hope Merkel pulls the plug and lets them dift gently down the kazi!
The Germans have not contributed at all to bailing out the Greeks.
I suggest you do a little research before forming your opinions (and especially before sharing them).
The Germans have lent money to the Greeks to suit their own purposes - if it now proves difficult to get back that is simply the problem faced by any irresponsible lender or loan-shark.