If you could erase one religion from ever existing, which would it be? That means nobody will ever be that religion or know about that religion, and all religious actions in the past by members of that religion will go away (Example: If you vote Christianity, the Crusades never would have happened. If you vote Islam, 9/11 never would have happened).
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Definitely not Judaism, because we owe the Jews for all of our technological advancements in the past 80 years or so. They are an incredibly advanced people.