In what ways is he wrong? That there's not a latent racism against second generation immigrants? I fear you might be quite naive if you believe that.
Same way as "John Carew isn't really Norwegian, you know" used to be an argument far too many idiots made when he was s***, and then the same idiots embraced him fully as the most Norwegian of Norwegians when he was not s***. Still see it today even with Josh King.
If Zlatan is treated in a special way, it's because of the arrogant guy he is. Even with his cocky attitude, he is well liked all over. I've seen Croats/Serbians claiming he's really one of them, but the Swedish have seemingly always loved him too. Let's not make an issue out of nothing He's probably just annoyed with him being at the end of his career and not getting the same praise he used to.
There's hardly been talk in Norway about that stuff with Josh King nor Carew. If anything, of late, we've heard more about "blenda white" teams being an issue. Come off it man.