The word “Celt” is largely meaningless. There were no such specific societal group as “Celts”.
“Celts” refers to speakers of similar (though not the same) languages within a celtic language group which includes Gauls (Who became Germans), Celtiberians, who became Portuguese, the Gaels, who became the English and Irish, etc… etc…
Saying that “Celts” are a society is like saying Peru, Argentina, Mexico, etc… are all one single people. (pro tip…they’re not)
So no, “celt” isn’t derogatory, and it certainly isn’t a synonym for “druid”.
The word “Celt” is largely meaningless. There were no such specific societal group as “Celts”.
“Celts” refers to speakers of similar (though not the same) languages within a celtic language group which includes Gauls (Who became Germans), Celtiberians, who became Portuguese, the Gaels, who became the English and Irish, etc… etc…
Saying that “Celts” are a society is like saying Peru, Argentina, Mexico, etc… are all one single people. (pro tip…they’re not)
So no, “celt” isn’t derogatory, and it certainly isn’t a synonym for “druid”.