if he had come from a fictional country, he probably wouldn't have fooled so many people into revealing their stupid ugly side.

You really think people like that would actually know the difference between Kazakhstan and one of the fictional countries in this list? For example Krakozhia or Novistrana or Zekistan.

Though of course many of those names were made up by people who might sue for breach of copyright. Using a real country removes that risk. You can't sue for breach of copyright just because you have been gratuitously insulted, and libel laws don't cover nations.