What a silly statement. "Europe doesn't have one in the top 10 if you remove its one entry in the top 10."
Had I not said what I said, I would have just as likely have had angry Brits in my comments.
You're also really missing the forest for the trees here.
London has like four major airports: https://en.wikipedia.org/wiki/Airports_of_London
Turkey has many of the political markers of being in Europe but is really a unique situation and its leaders like to take the best of being European and not-European where it suits them.
Do most people consider it a European country? Doubtful. I've never known any Turks who considered themselves European...even the super cosmopolitain globe-trotting kids of Turkish diplomats that I grew up around.
actual continents are too big, that's why in news you get more detailed breakdowns into areas like middle-east
If you discount Heathrow, Europe doesn't even have one in the top 10, whereas the US has 5 in the top 10.
The airports are different because the traffic volume is different.