What happens when you bring large numbers of people into your country who hold to a religion that teaches that violence in pursuit of ends that are deemed righteous can be a holy act? Some people are going to act on those tenets, especially insofar as they have hardened over the centuries into unquestioned cultural assumptions.

“Tramp ‘torched Turin royal riding stables,'” ANSA, November 8, 2019 (thanks to The Religion of Peace):