Shortly after, in response to the 2020 Nice stabbing committed by a Tunisian migrant, Darmanin negotiated deportation procedures with Tunisia. In February 2020, Darmanin sponsored a bill that French lawmakers said they hope will uproot radical Islam in France. Darmanin said the aim of the bill is to stop "an Islamist hostile takeover targeting Muslims". In March 2021, Darmanin went to court to prevent the building of a new mosque in Strasbourg, arguing dark money was involved in the project.