the Olympics
The Greeks did not invent pizza.
He brought out the sun every day. He pulled it out. That is what the Greeks believe in.
Greeks did not play sports.
the Greeks created baked brick in the year of 350 bc
Greeks eat a lot of fish. There are restaurants and taverns at every Greek city where you can find fish. Don't forget that there are so many islands at Greece where fish is the basic kind of food. Nowadays Greeks eat more meat than fish than fish but still fish is in the main menu of every greek family.
No, Greeks believed that their gods were immortal, as every people believe for their god.
Demeter's daughter Persephone had to spend 6 months of the year in Hades with her husband. When she was away Demeter was too sad to make crops grow.
Every 4 years
No more similar than every Italian is to every other Italian.
The Ancestors of modern Greeks are the Ancient Greeks. Some Greeks however, have got mixed ancestory as with every country, but on the whole, according to DNA testing as recent as 2012, about 90% of modern Greeks have the same DNA as that of the Ancient Greeks and are therefore descendants of the Ancient Greeks.
The Greeks gods, as far as I know, never required human sacrifice, however, King Minos did feed the minotaur seven people from athen every year.