"I always respond by pointing out that the citizens of almost every country are naturally xenophobic and/or racist, just not necessarily against people of African descent. In the case of Europe, I usually point to the Roma ..."
I think Roma are the least interesting example of this.
In 2020 I had the pleasure of reading the Nobel Laureate Sigrid Undset's Magnum Opus _Kristin Lavransdatter_.
For those that don't know, _Kristin Lavransdatter_ is the Norwegian _Anna Karenina_ ... but longer. Recommended.
In the book, among other things, it describes that Norwegians in the fourteenth century thought that Finnish people were basically sub-humans. They were treated like animals and could be killed (!) without legal ramification.
Let that sink in for a bit ...
Blonde-haired, blue-eyed Handt Hanson considered Blonde-haired, blue-eyed Eli Halla to not even be a human being.
I think there may be some deep conclusions to make about the nature of division and difference in human societies. Could it be that there will never not be an out-group ?