The history of Greece - both the current protests and the political history described in the article - are simply another playing out of some common patterns:
The US meddles in a country, a military dictatorship rises, the country is exploited, student protests follow. (e.g. most of the countries in South America.)
Mainstream politics undergoes a homogenisation: the number of influential political parties goes down, the policies of the remaining parties become more closely aligned. (e.g. England.)
Riots are sparked by a specific event, but are actually caused by socio-econonic divisions. (e.g. Paris.)
I've just made some horrible generalisations. However, the linked article offers no insight into the particular situation in Greece. History is briefly explained but then disregarded (the military government). General conclusions are drawn without any real evidence (riots in response to poverty). The current events described are linked to something that is getting a lot of headlines (the credit crunch).