"Disneylandia" is one long, breathless list, and that's the joke. Jorge Drexler sings a chain of tiny scenes where nothing stays in its own country: the son of Russian immigrants marries a Jewish painter in Argentina, then an African princess in Mexico; Hindu music smuggled by Polish gypsies becomes a hit in the interior of Bolivia; "Relojes suizos falsificados en Paraguay" (Fake Swiss watches in Paraguay) are sold by camellos in the Mexican barrio of Los Angeles. Careful with that one: camello normally means "camel", but here it's slang for a drug dealer.
The list is funny because one line breaks the pattern: "Pizza italiana alimenta italianos en Italia" (Italian pizza feeds Italians in Italy). And then comes the ending, which hits hard after all that mixing. Goods, music, money and tourists cross every border, but "Niños iraquíes huidos de la guerra no obtienen visa en el consulado americano de Egipto para entrar en Disneylandia" (Iraqi children who fled the war don't get a visa at the American consulate in Egypt to enter Disneyland). Everything travels freely, except the people who need it most.
It's a great song for learning nationality adjectives: rusos, polacos, japonesas, canadienses, iraquíes. Notice how they agree with the noun, like cebras africanas but canguros australianos.