“Of Fathers and Sons” follows the daily lives of an extremist family. Filmmaker Talal Derki posed as a sympathetic photojournalist to enter a village controlled by the al-Nusra Front in the Syrian Civil War and stayed with the Osama family for two years. The father works as a sniper and as a mine remover. He removes his children from school due to coeducation and latter sends them to a terrorist training camp. The older son embraces the cause; the younger wishes to return to school. Derki’s “admirably audacious feat” took home an Oscar and the Sundance prize for best documentary.