Jury vote is needed to balance the effect of televoting. You may say televoting is democratic, but it is not. Not only because you can deliver countless votes (you can't vote twice on election day), but also because you can vote for your home country abroad.
I tried that last year when I was in Romania, but it didn't work. I had to have a Romanian mobile for that.
The fall of Communism brought up countless new countries. They are now voting for each other, especially for the major country (Serbia, Russia).
The Balkan wars spread refugees to Central Europe, who don't want to go home anymore, although it's already save.
BBC commentator of 2005 called Austrian voting "bizarre as usual" because of highly favouring the Balkan countries. Still Balkan music doesn't really sell here and find its way into the charts, but people fell for Lordi, Lena and Rybak.
The call for immigrants in Western Europe brought Millions of Greeks and Turks there. Now these countries qualify handily because of that, and are always backed by televotes (look at last year's televoting figures).
Cyprus and Greece are always getting booed because of exchanging twelves, because the audience has a sense of unfair voting. But there is more worth getting booed, and there was a lot of booing in Helsinki, if someone remembers.