Another pack of bastards claiming that the modern Briton is responsible for every peccadillo committed by previous residents of that group of islands.

Fair enough. So, by that reasoning, many Americans, Kiwis, Aussies, and Canadians are also descended.

Since the islands were settled by Celts, Saxons, Danes (and other Vikings, particularly Normans) Dutch (who came to work and wouldn't go home again), French (who came because of religious intolerence) and divers other nationalities, then surely these nationalities bear just as much responsibility.

However, since many modern Britons are descended from none of the previous immigrants, why should they pay?

Obviously, before blame can be apportioned, then everyone in the world must be racially assessed, back about, say, 40 generations.
After all, the Poms are noted for their sense of fairness and justice.

Good luck getting that done.