The bible says we are to judge the brethren. If it looks like a duck, acts like a duck, smells like a duck, (and if my daughter is not around to chastise me) tastes like a duck, then it is a duck. The book says many people will do things in his name. And he will say he never knew them. Be on your guard, this entire movement is less than 150 years old from a church history standpoint. There is nothing new under the sun