Nationality is meaningless for determining any ethnic/racial blood lines.
Here is an Irishman for instance. How confusing is that?

It depends on whether people think "nationality" is more significant than "ethnicity" or "racial" categories. This day in age, with push of NWO, nationality is becoming arbitrary but the consequences (unintended?) is to destroy distinct populations.
Racial categories are scientifically valid and these groups have defineable and distinct/special charactersitics. I had to take this into consideration everyday during my career.
Scientifically and environmentally/ecologically I am interested in ethnic/racial categories because I believe that God created hundreds of distinct ones and it is our responsible to preserve their unique characteristics.
Although I have limited scientific training in such.
I am currently involved in eco-preservation of native growing plant species (weeds, ha-ha) but none the less they all are unique and deserve to exist in some habitat, where they can thrive without obliterating the otner species surrounding.
I am trying to get a species of wild flower that is becoming extinct to grow on my property. We will see if I can do that without transgressing the law.
tee-he.
Well, I am against 'genocide' or 'soft genocide' which is disturing the ability of any group, that identifies itself as belonging to a unique population, from prospering (without infringing on the prosperity of coexiting populations, of course).
If specific human populations want to form as a "nation" they should be allowed their soverignity and right to self-determination. (Take the passion of Jews for their sovereign religious nation state, for instance...and almost everyone agrees they have a right to such.)
What a long post for a half a glass of wine.