Actually, there was no Greece 2000 years ago.
There were little kingdoms like Sparta, Illyria, Thrace, Macedonia, Epirus, Achaia they were their own culture.
So, if all those ancient Kingdoms are what you call "Greek", Then so is Ancient Rome, Persia, and everything else that's ancient.
And it has been DNA Proven in Austria that the Macedonians of today are descents of the Ancient Macedonians.
Anyways
Ya know what's funny?
I go to a chatholic school, and in Religious Education, they say that God created the earth. But in Science , they say the big bang created the earth haha lol