"There is another, subtler way that terrorism can alter politics: by reshaping how people view themselves and the rest of society. Exposure to terrorism tends to increase support for extreme politics in a number of ways, according to a 2015 study led by Daphna Canetti-Nisim, a political psychologist at the University of Maryland. For one, it increases hostility toward minorities. While this effect is strongest when people associate that minority with the attack, it can play out in other ways. People who endure terrorism “feel threatened and vulnerable,” the study found. This “psychological distress” makes them ore likely to retreat to familiar in-groups and view outsiders as threats. This supports Ms. Le Pen’s narrative of a civilizational conflict along demographic lines. Terrorism can also increase “popular support for nondemocratic regulations and practices,” particularly those targeting minorities, the study finds. Ms. Le Pen has promised to impose restrictions on Muslims and immigrants that critics have called undemocratic or even authoritarian."