Just because it wasn't a big deal to you doesn't mean it wasn't a big deal to and for the nation. The apology was controversial as not all Australians agreed with it, which is exactly the point I'm trying to make.

Apologies are important from both sides. The apologiser is basically acknowledging a wrongdoing and wants forgiveness from the apologisee.

Which is the problem I have with this. See my original statement so I don't have to type it out again. 

It doesn't matter whether the people agree with it or not. Nikolić was elected by the people. If he wants to apologise on behalf of the state then its his decision. You can disagree, it's your right, you have freedom of speech. However, the state can make some decisions without the public's consent and apologies fall within that category.