There are a few neo-Nazi groups in Greece. And I suppose they have their share of anarchists. But why would any of them deliberately start massive, simultaneous fires?
Maybe as a false-flag operation. But in this day and age, it’s hard to hide such a thing for long. Everyone knows that. So if this horrible event was really arson, I wouldn’t think it was caused by home-grown crazies.
If I remember correctly, the last outbreak of fires in Greece was attributed to Muslims. Looking now for info.
There is one group in particular known for such arson yet you’re searching for stereotypical leftist bogeymen, why? Is the reflex to not blame the group in particular known for such arson that strong? Why are you afraid to say it’s Islamic terrorism? The likelihood is very high that it was.