They did it out of spite; they believe that players from the south teams are being overlooked (namely Hajduk) and instead picked from north teams (Dinamo) to play for the representation.
They are so revolted that they wowed to do anything to make uefa kick us out of competition.
We all knew that days ago, they announced that on facebook and forums all over the net, but nobody thought that they would do it, at least i didnt.
So, local feud just had premiere on euro. Some folk don't know when to quit. Small coutry mentality. Quite sad, really. But if they kick us out, it would force people to deal with this. their claims are not without merit, in part, at least. But Euro is not the place to resolve such issues.