What they're saying is that
- this indicates the spiritual vacuum afflicting Greece (and much of Europe) and Islam flows right into spiritual --- as well as demographic--- vacuums. By the way, the total fertility rate in Greece is 1.3 children/woman, and the media age of the population is 40. So, way, way below replacement, and not going to be getting better..
- If you think the Muslims are antagonistic to Christians and Jews, it looks like a love-fest compared to their historic aggressive campaign to wipe out polytheists. Thus this Apollo-stuff will feed their militancy.
That's the hypothesis. I guess we'll see, won't we?