I know it is a belief and I cannot prove it is true to anyone except myself.
You continue to get this backwards and put the cart before the horse....
God is not creating the New Race so they will follow Baha'u'llah, mankind will
become a New race by following Baha'u'llah. Moreover, God is not creating a New Race of Men, men will
become a New Race all by themselves.
Here are some more quotes that will hopefully help you to understand:
“At the heart of this system was what Bahá’u’lláh termed a “new Covenant” between God and humankind. The distinguishing feature of humanity’s coming of age is that, for the first time in its history, the entire human race is consciously involved, however dimly, in the awareness of its own oneness and of the earth as a single homeland. This awakening opens the way to a new relationship between God and humankind. As the peoples of the world embrace the spiritual authority inherent in the guidance of the Revelation of God for this age, Bahá’u’lláh said, they will find in themselves a moral empowerment which human effort alone has proven incapable of generating. “A new race of men” will emerge as the result of this relationship, and the work of building a global civilization will begin.” (Bahá’í International Community, 1992 May 29, Statement on Bahá’u’lláh, p. 26)
“In this age humanity has strayed far from the path of truth, and the call of Bahá’u’lláh to recognize Him as the viceregent of God on earth has fallen on deaf ears. But a careful study of His writings leads us to believe that His Revelation, being the culmination of past Revelations and one which has ushered in the Day of God Himself, will exert such a potent influence upon mankind as a whole that eventually all the peoples of the world will recognize His station of their own free will and embrace His cause of their own volition. And this in turn will bring about, in the distant future, the appearance of a new race of men whose noble character and spiritual virtues we, in this age, are unable to visualize.” (AdibTaherzadeh, The Revelation of Bahá’u’lláh v 3, p. 3)
“With the establishment of the Most Great Peace and the spiritualization of the peoples of the world, man will become a noble being adorned with divine virtues and perfections. This is one of the fruits of the Revelation of Bahá’u’lláh, promised by Him. The nobility of man and his spiritual development will lead him in the future to such a position that no individual could enjoy eating his food or resting at home while knowing that there was one person somewhere in the world without food or shelter. It is Bahá’u’lláh’s mission to create such a new race of men.” (Adib Taherzadeh, The Revelation of Bahá’u’lláh v 3, p. 126)
New Race of Men