FBI agents arrested a Michigan man on Friday accused of planning a mass killing at a synagogue in East Lansing, according to federal court documents filed in the Western District of Michigan. Seann Patrick Pietila discussed the attack on Instagram, court documents said, where he frequently posted anti-semitic remarks about hating Jews and being inspired by the men convicted of two mass shootings in New Zealand and Norway, who shot and killed dozens of people – driven to the murders by religious hatred and far-right extremism. He was charged with one count of interstate communication of threats and made his...