Pushing dyed blonde hair from her dark eyes, Nicole Kursch squints at her phone. Braced against the freezing Saxon cold, she taps the envelope logo on her screen to open the encrypted messaging app Telegram. Nicole, 26, scrolls through the many direct conversations and semi-private group chats to get information about the upcoming German election. Often she is scared by what she sees: videos of terrorist attacks, buildings exploding with fireworks and warnings about women’s safety. All, in her eyes, are bound together by one overriding threat: immigration. “People are talking a lot about migration in the Telegram groups I’m...