Esopo
Banned
If the Golden Dawn were to take power in Greece(and to be perfectly honest I don't think it is as unlikely as most here think) I doubt it would start a general war in the balkans. I think it would become more like Beloruss, another Dictatorship in Europe. Now what I fear more then sparking a general war, which I think is unlikely, is for this neo-fascism to spread across the balkans. Similar to what happened after Mussolini took power, other European nations began adopting it.
Of course the Golden Dawn taking power will come most likely through a Hitler type scenario, building a coalition and then kicking the others out. This could lead to a civil war in Greece between the far right and the far left. Though this is mostly speculative, and should go into future history.
That what should be feared. If GD manages to rule greece, it could be an example for future fascist regimes in europe. If the next big crisis (can happen for the china bubble, for american debts, for lack of european integration) makes other european economies collapse, then neofascists all around the continent could look at greece as the prove that it is possible.
That said, i think its all very unlikely.