It's hard to summarize the public opinion on that.
Some newspapers are trying to convince people that poor, poor Germany has to pay for all the lazy, lazy greek people

Some politicians try to defend the decisions made so far. It always sounds a little bit like: "Yes, it will cost a lot of our money, but it would be even worse if we did not help them...".
I think it's clear that Greece will almost certainly not pay back its debts. The interesting thing about this is: Germany will also not pay back its debts (roughly 2 Trillion ATM). Maybe people
think that they
could be paid back, that's why we don't yet have a problem with these debts, but ... guess what...
Germany and France have taken key roles in the introduction of the Euro, and Germany on the one hand as the trauma of hyperinflation in the early 20's, and on the other hand still remembers the German Mark, which was a very strong currency. They don't want the Euro to fail, and they don't want it to be weak...
But ... probably most people (including me) do not fully understand what is happening there. Maybe people are s!ck of hearing how much money has been and will be burnt. There are many talkshows and discussions about this topic, of course. But they are arguing about numbers and guarantees, a few hundred billions here and there ... and still nobody has the slightest clue whether it will work or whether it will fail ... and what 'failing' really means...