An in-house scandal in 2017 revealed that the museum was under surveillance by the intelligence services for harboring Scientologists in its ranks might have seemed bizarre to outsiders. It caused a small uproar in Bavaria, where Scientology is considered a threat to democracy and where it is illegal for Scientologists to work in government or for state-funded organizations. Three Scientologists were fired, and the flap exposed fissures between Mr. Enwezor and some members of his staff.