The harms Mr. Manz experienced during his short stay in August 2024 were numerous and varied, he would later write. He became nauseated and developed diarrhea and blisters on his tongue after taking a single bite of a taco. And he was ignored and discriminated against as a German, causing him such emotional trauma that he sought the care of a psychotherapist. When he returned to Germany, Mr. Manz filed three lawsuits — including two in federal court — related to his six-day trip.