So let me see if I got this right.
Some celebrity, who makes a living pretending to be somebody they aren't (ie actor/actress), has an opinion about some important world or national issue, and that they believe they know more about what we need than the rest of us. And if it doesn't go according to thier views, they are going to deprive us of thier physical presence and punish us by leaving our country...
sounds more like an ego problem to me.