Orionblamblam, you are completely in error in your definition of cult. A cult, as used in the context of Christianity, is any belief system which differs significantly from the beliefs or practices which are regarded as normative expressions of a particular religion. Let's take the two examples you cite, Mormonism and Jehovah's Witnesses. Mormons teach that God was once a mortal man; further, they teach that good Mormons will one day be the "gods" of their own worlds. This is a considerable departure from the Christian concept of God, and that makes them a cult. Jehovah's Witnesses use, essentially, the same Bible as Christians, but the "word changes" you disparage count a lot. For one, they deny the triune aspect of God, a foundational principle in Christianity, and make Christ "a god." Note John 1:1 as an example. In Christian bibles (Protestant or Catholic), it reads, "In the beginning was the Word and the Word was with God and the Word was god." The JW version reads, "In the beginning was the Word and the Word was with God and the Word was a god." This translation, BTW, is not supported textually in the Greek. And that makes them a cult.
> A cult, as used in the context of Christianity, is any belief system which differs significantly from the beliefs or practices which are regarded as normative expressions of a particular religion.
Then Protestantism is a cult if you're a Catholic. And vice-versa. Christianity is a cult if you're a Jew.
"Cult" is a loaded word.