Jehovah's Witnesses believe they are the only people on earth that are serving God and the only ones that will be saved. They dare not question the teachings of the Watchtower Society; one who questions the Watchtower Society is considered to be weak in faith and could be disfellowshipped. The bible they use is called The New World Translation published by the Watch Tower Bible and Tract Society as they rewrote the Bible we as Christians use as they teach a deceptive word of the Watch Tower Society.
They do not believe in the Trinity. Instead, they follow a strict monotheism, in which: Jehovah is the Supreme Being. Jesus is the Son of God, a created being. Christ is believed to have originally existed in a pre-human state as the Archangel Michael. He later took human form as a man like any other person, except that he was sinless at birth and remained so throughout his earthly life. Jehovah’s Witnesses do not believe in the bodily resurrection of Christ. They believe that after the crucifixion, Christ died and was resurrected as an invisible, non-material, glorious, spirit creature. They believe that Jesus appeared on earth after his resurrection in a special body that Jehovah created for him.
It's like any religion that is not of God, we need to learn how to Spiritually discern what others are trying to teach us. If it does not line up with what God has already had written then do not believe a word they say.