I’d call the easiest large religion to debunk the whole JW spectrum, because of the multiple false prophecies and lack of qualification on the part of their translation team. But they aren’t allowed to listen to opposition.
Then Scientology and every other new, tech-based or pseudoscientific system, because it’s so easy to find the evidence the founders were openly making it up, because it doesn’t work and because of the documents telling the middling levels not to share the real beliefs with newcomers, so how would they know they themselves even have the straight story on what thye’re promoting?
Around third or fourth I’d consider it a tie between LDS and similar religions, and Dan-Brown/Acharya-S/Joseph-Campbell theories, because the historic evidence is so overwhelming that they misrepresent religious history vastly at pretty much every stage and have changed their own stories constantly as well. Danbrownists also share with JW’s a strange resistance to looking at ancient historic documents at all without misrepresenting them in the crudest ways, and even seem not to notice that every historian is aware of the Roman custom of crucifixion, which has left unmistakable physical evidence. But they also tend not to listen to those who disagree.
Fifth easiest? Who knows. Islam, because of the lack of any witnesses to Mohammed’s revelations? Any other self-proclaimed, unevidenced founder-prophet, such as the Unification Church or the Children of God or Alamo…? Any other unqualified Bible scholar, such as Harold Camping or that guy Darwin Fish (real name) of “a-true-church” or Tim LaHaye or Dave Hunt…?
