I'm sure a simple blood test would prove which country they come from...it shouldn't be outside the bounds of possibility. If I want to find out where my ancestors were from, I can do that, with a blood sample.And if they won't say where they are from, tell them they are going to Syria, or Israel, or the North Pole. They'll soon squeak. But I suppose taking a blood sample would 'invade their human rights'....you are quite right...the law needs to be changed, and we need to get tough.