It talks about how the classic push/pull factors are way less important than culture and language.
To me, denying the push/pull concept is dumb, I'll absolutely conceede that the main push/pull factors may not be as prominant as previously suggested, but the play a part.
The article gives examples of how people want to go to a place with very similar culture and language, and as an example of that the bring up that the vast majority of syrian refugees are housed in Turkey, not other European countries, this is only natural, Turkey is neighbouring Syria, sp naturally most refugees go there, Poland and Ukraina is a similar situation, brodering nations.