You have a point here but it does not invalidate the arguments that: social democratic parties and gradualist approaches to achieving socialism have been knocked for six by the demise of the USSR; and that like is not being compared with like when we compare the position of communist parties today with those in the 1930s.
Note that the KKE has not actually called anybody "social fascist" and that as far as I know, unlike the situation in the 1930s, the question of the formation of an anti-fascist front has not arisen in the current debate on the Greek economic crisis. At least not yet. Should it arise, I fully anticipate that KKE would be in the lead for such a development.
However, the debate at the moment in Greece focuses entirely on the nature of the debt, the forces of the plutocracy that has created it, and the impact the crisis is having on the working people of Greece, and their right to govern their own affairs.
The KKE has given its Marxist analysis of the situation (see previous posting). What do the critics of KKE on this site want then to do? Are they to say, well we have our Marxist ideas about the crisis and waht should be done but OK we will forget about all that and for the sake of left unity join together with people who believe something completely inconsistent with our analysis, even though - to make matters worse - we can see the EU inevitably bearing down on us like a bulldozer, whatever we do. I am sorry but I just don't get it.
One way or another the EU will swallow up Greece. Only KKE - like Leonidas - stands firm.
BTW Janos point seems also to reopen discussion of the Bernstein-Luxembourg debate about Reform or Reevolution. Seehttp://en.wikipedia.org/wiki/Social_Reform_or_Revolution.
But I will leave that for others should they wish.