There is no incidence of Rh- among non-white groups, or groups without some white admixture (i.e. Filipino's). The incidence of Rh+ blood among whites is directly related to their distance from the Atlantic Coast (Rh- is most predominant among the Berbers of Morrocco, Spain, Ireland and the UK, and Norway), while the further one goes from the coast, the more likely it is that people are really of mixed blood, like the modern Greeks and southern Italians.
A mother, who is RH negative and is carrying an RH+ baby, is NOT going to suffer terribly / die. What old wives tales ( or did you just make that up ? ) are you getting this from ? Neither is aan RH+ mother, carrying an RH negative baby, going to suffer terribly / die.
Ummm .. why then do hospitals give rhogham shots out to Rh- mothers bearing Rh+ children? For fun? To collect extra money from insurance companies?
Oh and an " ethnicity " refers to a person / persons from ddifferent places ( i.c. Sweden, Germany, Austria, England, America,etc. ) and NOT race, per se.
The terms of ethnicity, race, etc. are a mess. Simply put, it is clear that Alpine Europeans (southern Germans, Yugoslavs, northern Italians, French, Spaniards) are different from Nordic Europeans (Swedes, Irish, Scots, Brits, Dutch, northern Germans), and are different from Mediterrean Europeans. And they are just as different as are Chinese and Mongols, and Turks, and Arabs. If you can't tell them apart as a group, you've obviously never been to those countries. They not only look different, but also behave different, and even believe different (is it really an accident of history that most of the Nordics were swept up in the Reformation, while the Alpines and Mediterreans were not?). You are free to call all these people ethnic groups, and I can call them racial groups and we can all site biology texts to "prove" it.
There are THREE and ONLY three, racial groups. Yes, there ARE subgroupings; NO, there are NOT subgroupings amongst European Caucazoids !
No one, not one " expert ", has EVER claimed that the Irish ( mixed blood lines : i.e. Celt / Sapnish / Viking ; to name but a few ) nor the British ( again, even MORE mixed bllod lines : Celt/ Frank / Norman [ which, in and of itself is a mixture of Viking and a few other ethnics ]/Angle / Vicking / German / Dutch / Irish ( Cocknies were originally IRISH ! )/ Hugenot French / and on and on and on) are " Nordics " . The Scothc are mostly PICTS , with a tiny addmixture of Celt . They are the LEAST blended, of ALL of the British Isles and hardly " Nordic " !
There are Englishmen, whom you couldn't tell from a German, whom you couldn't tell from an Austrian, whom you couldn't tell from an Hungarian, and on and on and on. Since YOU seem to be unable to understand that, then following upon your form of " logic ", one MUST suppose that YOU not only don't know what you're talking about, but that you haven't been to any of those countries.
Attempting to make a sociological statement, using Catholic V Protestant, you've completely neglected such reformational outcroppings, that PREDATE the Reformation, and took place in Eastern Europe and France, CENTURIES prior to the actual Reformation.
The majority of Caucazoids, from Europe ( in any and all permutations, that you, pretzel like are trying to do ) are NOT RH- ! Yes, pregnant women, who are + or - and carry an opposite baby, can have problems. They can also become ill and / or die, from a whole host of other reasons.
You're in WAAAAAAAAAAAAAAAAAAAAAAAAY over your level of knowledge,here, and I heartily suggest that you stop digging so many holes, all at the same time. Before these posts, of your's, one could only speculate on how little you know. Now, we all know just how little you know about and are only too happy to prove your incapabilities. :-)