Because I know the Greek kind of spirit when I read the mosquito thing I didn't think, oh that is racism, mainly because they have created a tone if these jokes last month and also Greeks make these anecdotes of cynic humor in their own disasters always, like the eartquack of 1999, the jokes about people "underground" were for almost a year, but from an outsider it looks worse.
Also greeks generally are suspicious and annoyed from Balcan immigrants and they are racist towards them, and these people are almost two millions, but peOple from Africa, India and rest Asia are digested in Greek society, a very good indication is that where latter live the rents are still high, while in Balcan immigrants areas Greeks don't wanna live.
But I understand that when you represent a country in olys then you don't expect the world to know what is going on in your country, I really think it was a poor judgement of her and a low level joke.