"Beur" is "verlan", which is to say inverted slang for "Arabe", inflected by the idea of Berber. "Les Beurs" are the Arabs of France, North African by origin.
This is the great challenge of France, to assimilate les Beurs.
Thanks
Are they the ones who appear in the morning to sweep the streets of Paris? (Forgive the stupid questions, my time in France was too short to understand everything)