well its a double barrel effect; firstly alot of greeks that migrated into australia where from central or southern greece and they tend to be a little bit darker due too excess sunlight, any that where blonde that came here usually have been here ~60 years and the sun in australia is different and forces hair to go darker
alot of people of caucasion descent are blonde until they're like 3-4, my mum was blonde until she was 20, she came to aust when she was 15 and it took 5 years for her hair to go darker (it just happend after she cut it), i had blonde hair until i was about 5 so its no mere coincidence
"some" greeks look arabic, mainly the islenders (limnos, etc.) where they dont have winter, just summer and they go black basically, fair greeks like me skin goes honey brown not a dark brown. when i went too greece in 1999 i was only there for 2 weeks and didnt go to hte beach, my hair went light brown/dark blonde, when i came back too aust the next regrowth was that same colour, i got ahaircut and it regrew dark brown again
my point is: alot of greeks are blonde but the climate tends too change that, most light greeks are in northen greece (makedonia (no not FYROM), thrace) where they got blonde hair/green eyes.
it'd explain why my uncles on my mums side are all dark, married blondes and had blonde kids because its recessive gene
alot of the greeks are different in greece remember, they have a totally different mentality here. you know how im very conservative sort of person, most of them are like that, they are also backstabbers and manipulative liars but thats greeks for you