Facts are: Greece had a spending deficit for several decades now. This spending deficit accumulated to such a big dept, that no investors were willing to lend greece any more money. 18 european countries transferred billions of euros in the last couple of years to greece, to help the country and the people. In return they had an agreement that greece would cut their spending. Greece never lived up to the agreements it made. In the last weeks 18 european countries offered greece another bailout, where greece would receive several bilions again. In return they asked greece to finally cut spendings.
Now greece voted against this bailout. There are a lot of people in europe (myself included, I am from Germany by the way) who are not willing to transfer further billions of euroes to greece, just so that a socialist party can fullfil its "promises" and increase their deficit.