Phenotype does not necessarily imply Northern European ancestry. A case and point is that many Ashkenazi Jews can actually pass decently as Europeans and even NW Europeans, yet plot by Sicilians. 9/10 times I could pick an Ashkenazi from a group of Sicilians, but not so in Europe. I'm paler than most non-ginger Englishmen, yet plot like a typical Ashkenazi Jew - right by the basically MENA looking Sicilians. Am I a figment of the imagination of your typical Nordicist?
So how do you explain the blonde hair and blue eyes of this individual?
And the fact that the Mycenaean samples were more Northern-shifted than the previous inhabitants?
What about the Corded Ware-like individuals that have been found in Greece?
And even if the origin of ancient Greek blondism isn't from a Corded source, what about the blonde EEF samples, and the light-featured Chalcolithic Levantines? The red-haired, pale-skinned, blue-eyed Chalcolithic Armenians?
I think YOU need to get a grip, mate.
There were blond Greeks much like today - no explanation needed. No CW-like individuals have been found in Greece.