The article basically says that Greek anti Americanism is based on Greek leftism. Well, leftists always hate America, so if Greeks are leftists or sympathize with leftist thought, of course there will be anti Americanism.
OTOH, friends of mind from Miami recently toured Greece and reported being treated nicely wherever they went. I myself would love to see the Greek islands one day, or at least some of them.
Yes, they will smile as they take your money.