“Serb minority would eventually reach a “biological end” as the average age of the Serbs was much older”
Nature is both cruel and pure. If you don’t make babies, you cease to exist.
The Kosovo situation is such that Serbs don't have opportunities to raise a family safely and have little hope for the future - THAT is why there's this older population. Many, many young families and children have fled to Serbia or abroad (if they could). Kosovo Serbs actually had larger families than other places.
And this guy simply talking about Serbs dying as ending the "problem" is similar to Nazi talke about the solution to the Jewish problem. The guy is a neo-Nazi.