In Greece, yes they are. The socialists led the government that imposed austerity and the commies and unions played their part in propping them up. This is basic knowledge. (By the way, the article you quoted had some poor wording. It seems the CP and Syriza have 12% *each*, so in this sense the three leftist parties together do have more support than the ND.)
> As to the missing a part - I think it is you who missed one - the
> radical left who were not in cahoots with the "primary oppressors"
> from your list. Yet their support is in single digits according to the
> report. So it makes sense to ask why did the brutalized Greeks did
> not turn to them for a relief but rather to a center right party?
This is where it's helpful to know the situation you are commenting on instead of making blanket assertions. Since the fall of Papandreou's government (and even, strategically, during it), all of the political parties in Greece have been holding themselves out as the most nationalist, the biggest defenders of Greek sovereignty, etc. The ND's primary platform plank is to protect civil service workers from more wage and pension cuts, making it indistinguishable from the leftist parties.