I have a friend in Serbia and apparently it's just an election stunt. What the proposal from UN aims to do is to just establish a day of remembrance to a genocide that happened, but the ruling party has twisted it into "UN is trying to declare us as a genocidal nation" to garner increased support from the nationalists.
The election itself is a re-run of a previous election, due to the previous election being pretty much rigged by the same ruling party. Simply incredible.