If they refused to hand over data that they had about individuals on a warrant, I can see how the arrest was kind of justified.
If the arrest was for refusing to install a backdoor for law enforcement to spy on anyone they want, then France needs to be kicked out of EU and sanctioned for human rights violations.
Systemic racism and religious discrimination persisted, including against Muslim women and girls. Racial profiling continued with impunity. Excessive restrictions on protests and excessive use of force by police continued. Mass protests and unrest followed the killing of a 17-year-old boy of Algerian descent by police at a traffic stop. Racist, xenophobic and anti-LGBTI vandalism and violent attacks were frequently reported.
Parliament passed highly controversial new laws authorizing the use of mass video surveillance technology by law enforcement and introducing discriminatory immigration, nationality and asylum restrictions.
They've been delaying a vote on it because they haven't had enough support to get it through.
Looks like they'll prepare another round in October, which would be voted on in December. They'll want this to pass under the radar, preferably behind closed doors.