That is why the primary instruction for discerning the spirits was a question as to whether Jesus/Y'shua the Anointed came in the flesh or not. Because to deny that would be to deny the incarnation, death, resurrection and ascension altogether. Clearly there are those who hold or who have held to the notion of only a 'wraith like' or 'spirit form' having come or, alternatively, the idea that he never came ever. Falling for mere manifestations of power or psychic experience isn't sufficient.
So that entire camp that denies he and the Messiah ever came is described by reference (they are waiting for a different Messiah--whether they call him "Christ" or "He" or "Him" is irrelevant). Could there be such a thing as subscribers to a proverbial Worthless Shepherd function?And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world. --1 John 4:3 (KJV)