Well, if part of his career has to do with working with people from his home country, it very well could be.... once you get shunned for something like this, the people he knows will not stick around for fear they will be looked at as the same, so no more contacts for his career..... you see it as an overreaction because in your life and your country, it's not so much like that..... if it was, I'm sure you'd understand better