And some parents do learn Swedish so their children might not know their parents native language. Or have you inspected every Somalian family in Sweden? It might not be that many, but doesn't make his point any less true.
Surely we can agree that if such kids exist then they must be very, very few in number?
I don't believe that integration has worked well either, but it doesn't mean that I think we should "send back" people that were born here and don't have any other citizenship.