Some of the extremists that you were warned about earlier are posting on here now.
I don't want racism or any negativity
And you have been warned against it, so just ignore posters which you don't like.
Genetics is complicated science, so it is natural that some people want to simplify it and make money out of it. As has been shown, talking about "British" DNA is silly in itself as the British population is composed of many waves of migrations. Basically, there are Celtic people, there are Anglo-Saxon people, and there are descendants of the Viking people there. The old waves of migrations may have perhaps been more homogenous than the present ones. Let's take the Czech people, for example. Even if they consider themselves Slavic, genetics reveal that the population is onle half-"Slavic", that is gene R1a is present in half of them, but the rest are Celto-Germanic (even the once commonly used name for the country "Bohemia" is of Celtic origin). So how can you detect "Czech DNA" in people, for example?