With one stroke of the pen (perhaps three), you have summarily dismissed Mormonism, Islam, and the Baha’i faith. To devout Mormons, Joseph Smith was NOT a fraud; to devout Muslims, Mohammad was the last and greatest prophet, NOT Jesus; to devout Baha’i believers, Baha’u’llah was INDEED a Manifestation of G-d, in a long and venerable line of Manifestations, though not necessarily the final one. Their beliefs are just as worthy of respect as yours or mine. And, as Kaninchen is wont to say, Judaism is NOT merely Christianity minus Jesus, while Christianity is NOT merely Judaism plus Jesus.