I feel like your title is fine, though if "fear of" would fit it might be relevant, such as: Fear of 'Demonic forces' stopped official investigations into UFOs

I feel like your title is fine, though if "fear of" would fit it might be relevant, such as: Fear of 'Demonic forces' stopped official investigations into UFOs in the UK Since that recasts it a little bit as "officials didn't want to investigate as they thought the UFOs were demonic" rather than "officials didn't investigate because demonic forces prevented them from doing so".