Genealogy / Why are some Polish people dark complected, and others very light [511]

What happened to the original question ?
Poland is a nation, therefore Poles are a Nationality group.
Being Jewish refers to a Religious group.
Racial group originally was a larger group which had similar physical characteristics;
more recently that has become skin color. the problem is there are millions who don't fit into any group: or for their own issues others put them into a different group.