Not at at all, no more than I will be Italian or Norwegian or Russian or Chinese because at some stage I likely had an ancestor from one of these places, or does it worry you that on that basis you could be called a Briton , bearing in mind the chances are that if the theories are correct any Ancient Briton who has living descendants is likely to number you amongst them.
Its what makes theories of Racial superiority so stupid bearing in mind if you go back far enough (possibly only 2000 years)everybody is descended from everyone who currently has living descendants.
The prospect is that in a few thousand years if I have living descendants at that time all living humans wlll count me as an ancestor.