Prior to the attack, French police had caught one of the jihadis repeatedly attempting to travel to Syria to join ISIS. Nevertheless, he was free to roam the streets of France, as long as he wore an electronic bracelet.
Even worse, French authorities knew that the church was being targeted by ISIS, since an ISIS hit list found in 2015 named the church as a target.
Given the circumstances, do French authorities bear some of the blame for the outcome of the attack?