The fallout from the violent death of Quentin Deranque exposes Jean-Luc Mélenchon’s flaws – and leaves the wider left facing an impossible dilemma

In 2023 Jean-Luc Mélenchon, the firebrand leader of the radical left party La France Insoumise (LFI), made a fundamental miscalculation. He publicly promoted a small group of young antifascist activists. La Jeune Garde, founded in Lyon in 2018, were politically inexperienced and had organised a series of sometimes violent confrontations with far-right groups.

Members of the group, which was banned in 2025, are now suspected of involvement in a killing that has convulsed France. The victim, Quentin Deranque, was a 23-year-old mathematics student and a far-right activist.