Does the author even know (or does he just want to hide) that Zurich is in a German-speaking part of Switzerland, and that Einstein surely didn't feel like an "immigrant" there?
Isn't it annoying reading how Einstein is used by a lot of writers as an attempt to prove any claim they make?
The claim that Freud's "immigrated" is equally absurd. Wikipedia has the name and the location of the place where he was born: "Freiberg in Mähren, Moravia, Austrian Empire." (Now it is in Czech Republic and called Příbor, but it's still the same place). He just grew up some 200 miles southwest from his birthplace, right in the capital of the Empire. His father actually brought him and the family to Vienna as Freud was only 4. He certainly never remembered any other place and went to all schools in Vienna.