ATHENS, Greece—The last dog days of summer are usually quiet in Athens. Most people leave for their summer holiday, scattering to beaches looking out over azure waters or mountains filled with wildflowers. Only a few dazed tourists remain behind to wander the city. But in the central Athens neighborhood of Exarchia last August, the mood was somber and determined as protesters marched through the streets. “You can’t evict a movement!” read one banner, clearly aimed at the right-wing New Democracy government, elected the previous month, and its hard-line policy on migration. Exarchia has long been associated with left-leaning political activism, […]