The former Carthusian monastery of Trisulti is nestled amid woodland in a remote corner of the Monti Ernici mountain region, near Frosinone, 47 miles south east of Rome. This mystical corner of the world was catapulted into the centre of the culture wars when Steve Bannon, Donald Trump’s former chief strategist, decided he would use it to train “gladiators” ready to defend the Judaeo-Christian West.