thou shalt attack JW's it's the only way to heaven, page-5

I think that part of the answer is so much of the Jehovah's Witness theology is shrouded in mystery for outsiders.
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Whereu, Jehovah's Witnesses base all of their beliefs & practices on the Bible. Their meetings are open to the public. Attendance is welcomed and no collections are taken. I do realize that this may seem strange to many.