Do you have any evidence from any scripture that Jesus left His body to reincarnate as these people? Has any of these people claimed to be reincarnations of Jesus or claimed to be incarnations of God?
This isn't 'reincarnation' in the sense people understand the term. Muhammad seems to lay the claim to be "The Comforter". The bab lays the claim to be the Imam Mahdi awaited by the followers of Muhammad. baha`u'llah claims to be He Whom God Will Make Manifest proclaimed by the Bab--also the Shah Bahram, the Fifth Buddha, the return of Christ in The Glory of the Father.
To ponder:
1) All the Great Prophets are the Self-Same Spirit
2) All the Prophets are individual men born in different times and cultures.
3) All are the promised Manifestations of the preceding Dispensantion.
All at the same time.
"Furthermore, it is evident to thee that the Bearers of the trust of God are made manifest unto the peoples of the earth as the Exponents of a new Cause and the Bearers of a new Message. Inasmuch as these Birds of the Celestial Throne are all sent down from the heaven of the Will of God, and as they all arise to proclaim His irresistible Faith, they therefore are regarded as one soul and the same person. For they all drink from the one Cup of the love of God, and all partake of the fruit of the same Tree of Oneness. These Manifestations of God have each a twofold station. One is the station of pure abstraction and essential unity. In this respect, if thou callest them all by one name, and dost ascribe to them the same attribute, thou hast not erred from the truth. Even as He hath revealed: "No distinction do We make between any of His Messengers!"[1] For they one and all summon the people of the earth to acknowledge the Unity of God, and herald unto them the Kawthar of an infinite grace and bounty. They are all invested with the robe of Prophethood, and honoured with the mantle of glory. Thus hath 153 Muhammad, the Point of the Qur'án, revealed: "I am all the Prophets." Likewise, He saith: "I am the first Adam, Noah, Moses, and Jesus." Similar statements have been made by Ali. Sayings such as this, which indicate the essential unity of those Exponents of Oneness, have also emanated from the Channels of God's immortal utterance, and the Treasuries of the gems of divine knowledge, and have been recorded in the scriptures. These Countenances are the recipients of the Divine Command, and the day-springs of His Revelation. This Revelation is exalted above the veils of plurality and the exigencies of number. Thus He saith: "Our Cause is but one."[2] Inasmuch as the Cause is one and the same, the Exponents thereof also must needs be one and the same. Likewise, the Imams of the Muhammadan Faith, those lamps of certitude, have said: "Muhammad is our first, Muhammad our last, Muhammad our all."
[1 Qur'án 2:285.]
[2 Qur'án 54:50.]
It is clear and evident to thee that all the Prophets are the Temples of the Cause of God, Who have appeared clothed in divers attire. If thou wilt observe with discriminating eyes, thou wilt behold them all abiding in the same tabernacle, soaring 154 in the same heaven, seated upon the same throne, uttering the same speech, and proclaiming the same Faith. Such is the unity of those Essences of being, those Luminaries of infinite and immeasurable splendour. Wherefore, should one of these Manifestations of Holiness proclaim saying: "I am the return of all the Prophets," He verily speaketh the truth. In like manner, in every subsequent Revelation, the return of the former Revelation is a fact, the truth of which is firmly established. Inasmuch as the return of the Prophets of God, as attested by verses and traditions, hath been conclusively demonstrated, the return of their chosen ones also is therefore definitely proven. This return is too manifest in itself to require any evidence or proof. For instance, consider that among the Prophets was Noah. When He was invested with the robe of Prophethood, and was moved by the Spirit of God to arise and proclaim His Cause, whoever believed in Him and acknowledged His Faith, was endowed with the grace of a new life. Of him it could be truly said that he was reborn and revived, inasmuch as previous to his belief in God and his acceptance of His Manifestation, he had set his affections on the things of the world, such as attachment to earthly goods, to 155 wife, children, food, drink, and the like, so much so that in the day-time and in the night season his one concern had been to amass riches and procure for himself the means of enjoyment and pleasure. Aside from these things, before his partaking of the reviving waters of faith, he had been so wedded to the traditions of his forefathers, and so passionately devoted to the observance of their customs and laws, that he would have preferred to suffer death rather than violate one letter of those superstitious forms and manners current amongst his people. Even as the people have cried: "Verily we found our fathers with a faith, and verily, in their footsteps we follow."[1]"
[1 Qur'án 43:22.]
(Baha'u'llah, The Kitab-i-Iqan, p. 152)
Regards,
Scott