Have you ever been to Serbia?
That's bullshit, twice over. For one I don't pop up in every thread about Serbia (and a casual inspection of your comment history shows that you in fact do exactly that), for another I have not made the claim that they are overall xenophobic people, that's your strawman.
I wouldn't make the claim that people from NL (where I'm from), Germany, Serbia or any other country that I'm familiar with is "the least xenophobic places out there nowadays".
If you can prove the opposite I'll be happy to take it back. Just like those other countries I've mentioned Serbia has it's problems. Denying that doesn't make it so.
P.S. my accent is also wrong, should I be afraid?
I'm not trying to say that Serbia sucks, or that Serbs suck, or that all Serbs are like that, or anything in that direction. Almost all people I personally know from ex-Yugoslavia (including Serbia) are great people. But – especially given the conflict-rich history of that area – there are still a lot of conflicts and animosities between ethnic groups, and Serbia also has its fair share of xenophobia (in contrast to what GP suggested in their comment).
But the article was also surprisingly silent on why they were becoming Serbian citizens.