Exactly, Greece is only the one to blame, if Greece is not in EMU, then Italian will be the one to blame. It is impossible to repay the loan in today's debt based fiat money system.
That is true, but I don't think it is a problem. If GDP increases at the same/higher pace than the growth in debt, there is a kind of stability. The problem comes when there is a slowdown in growth and countries are unable to refinance their debt.
You use money to measure GDP, when GDP increased, the amount of money supply will also have to be increased. And since money supply can only increase with higher debt level (Today's fiat money is all created by debt), higher GDP must correspond to higher debt. And since each debt has an interest, but GDP does not have an interest, so GDP increase will never catch up with debt increase. The system is designed in such a way that there is no escape for the whole nation who use the fiat money
From an individual (or even enterprise) point of view, money is almost unlimited, you just need to put some effort to grab them. But from a whole nation's point of view, you can't make more money if there is no corresponding amount of money created at the first place. And since those money can only be created by loan, the growth of the economy is capped by the size of the national debt