Filed a complaint for 'public insults' of a racist nature.
Targeted by racist insults on the CNews channel since his election.
Calls for unity and constructive action in response to hate.
Briefing: New Saint-Denis mayor seeks to turn racist insults against him into 'a foundation for building things'
Strategic angle: Bally Bagayoko, the new hard-left mayor, aims to transform negative experiences into positive community initiatives.