M0nica
Since hominoids developed in Africa, anyone inhabiting this island and, indeed, the whole world, other than Africa, is an immigrant - and where does that get us?
An understanding of people's DNA undoubtedly upsets people who believe in a concept of nationhood. Scotland, for example, is remarkably diverse. There are at least six separate indigenous ethnic groupings in Scotland, with those in the south east having more in common with the English than they do with those in the north east or west. The idea of "English" DNA just doesn't exist. Nevertheless, an understanding of DNA and genetic difference contributes to knowledge of some heritable conditions.