We believe Jesus to be the one prophesised by Isaiah:
According to the New Testament, Jesus of Nazareth was not found in his grave after death, he was "cast out of [his] tomb". According to the Christians, this Jesus was God, and in the Bible it is true that he said "I will make myself like the Most High", and for that reason was he rejected by God, cast out of his tomb.
The Christians believe he ascended to God out of his tomb - this is the fabrication of the disciples who were bereft of their Master, the Son of the Dawn. Perhaps they were merely mistaken, or perhaps Paul, when he came along and mixed paganism with Jewish tradition, invented his dying and rising god along the lines of Osiris, or Aten. The fact remains, they were wrong.
We believe the Son of Dawn to be Jesus of Nazareth. His followers have fulfilled the prophecy of "the man who made the world a desert, who overthrew its cities", no religion on earth has killed and ravaged more peoples and lands than Christianity. In the Crusades it attacked the Holy Land, thus fulfilling the prophecy of Isaiah - "for you have destroyed your land and killed your people", they killed the people of God - the Jews - both in the Crusades, and in the many holocausts perpetrated by Christians throughout the ages.
We reject the branch of Jesse, we reject the Nazarene, and we reject him as god or savior. We have no God but Yahweh, and him only will we worship.
These then, are our reasons for believing Jesus to be false. We believe that no believer in him either as Messiah or as God will be saved from the Day of the LORD, as the wicked will perish, and only those clean before the LORD (the Chosen) will be deemed fit to live in the new kingdom (see Malachi 4).