I don’t care what you say and explain, there is nothing scientific or explainable about how Poland fits in that group to which it is assigned. The ONLY similar condition I’ve seen in graphs are those that indicate Gerrymandered Political districts.
This whole thing is just not worth discussing anymore. I don’t have anything vested in it other than a willing suspension of disbelief.
Per Wikipedia...
"Poland is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south...
....in 2007, 88.4% of the population belonged to the Catholic Church"
Seems like a scientific, explainable reason for including them in the same colored blob as the other Catholic European nations.