One of my main questions to Baha'is is that why should a Jew have converted? Converted to what? A religion that made Jesus into God? Something that Baha'is say is not true. So why should a Jew believe and convert to Christianity?
i see it differently, it is not a conversion in the true sense, as it is not about giving away ones Faith and changing ones Faith for another, it becomes the fulfillment of ones Faith. The Essence is never changed, outward understandings and Names will be changed. This quote by Abdul'Baha is along that line of thought;
"..The religion of God is the One Religion, and all the Prophets have taught it, but it is a living and a growing thing, not lifeless and unchanging. In the teaching of Moses we see the Bud; in that of Christ the Flower; in that of Baha’u’llah the Fruit. The flower does not destroy the bud, nor does the fruit destroy the flower. It destroys not, but fulfills. The bud scales must fall in order that the flower may bloom, and the petals must fall that the fruit may grow and ripen. Were the bud scales and the petals wrong or useless, then, that they had to be discarded? Nay, both in their time were right and necessary; without them there could have been no fruit. So it is with the various prophetic teachings; their externals change from age to age, but each revelation is the fulfillment of its predecessors; they are not separate or incongruous, but different stages in the life history of the One Religion, which has in turn been revealed as seed, as bud and as flower, and now enters on the stage of fruition.' – Abdu’l-Baha, quoted by J.E. Esselmont in Baha’u’llah and the New Era, pp. 122-124.
Regards Tony