HIV resistance of the gene causes me to wonder if it is more frequent among Rh negatives. According to the charts available, not necessarily. On a global scale yes as it is more prevalent in Europe, but Nordic countries stand out more than Celtic ones.
Chile is of interest though, but is it the Basque population or the Germans responsible for the high frequencies?
Spain and France only provide national, not regional data. A lot is still missing to draw a clearer picture.
See more:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3344725/
There is also more data here:
https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.0030339