JWs teach the reason God allows wickedness is because Satan challenged his sovereignty. This means satan said that man doesn't need God and could rule themselves without him. Didn't the Tower of Babel prove satan right?
Genesis 11:6 Jehovah then said: “Look! They are one people with one language,+and this is what they have started to do. Now there is nothing that they may have in mind to do that will be impossible for them. 7 Come! Let us+ go down there and confuse their language in order that they may not understand one another’s language.”
Didn't God prevent them from accomplishing anything they could?