Welcome, Baha’i friends. Even though I believe that Jesus is the GREATEST, I have a lot of respect for your faith.
My understanding of their belief in the unity of humanity and one world government is that God will do the work-- they as an individual or as an organization do not intentionally work toward it. They are more Chardain-ian than Franciscan in perspective.
If I had time right now

I would definitely get into those readings.
Jerusha,
Thank you for the welcome. Your understanding is correct, at least to a point. Obviously God works through us, but it is true that Baha’u’llah teaches that the work of spiritual transformation (both at the individual and societal levels) is so great that it cannot be accomplished without the power of the Word of God. We try to learn to rely upon Him and seek His help in all matters, and trust that He will guide us in our actions to make such transformation possible. But we also have to make an effort. If we don’t make an effort, we won’t get anywhere (as in all aspects of life).
Regarding Jesus, one of my most favorite passages from Baha’u’llah’s Writings is about Him:
Know thou that when the Son of Man yielded up His breath to God, the whole creation wept with a great weeping. By sacrificing Himself, however, a fresh capacity was infused into all created things. Its evidences, as witnessed in all the peoples of the earth, are now manifest before thee. The deepest wisdom which the sages have uttered, the profoundest learning which any mind hath unfolded, the arts which the ablest hands have produced, the influence exerted by the most potent of rulers, are but manifestations of the quickening power released by His transcendent, His all-pervasive, and resplendent Spirit.
We testify that when He came into the world, He shed the splendor of His glory upon all created things. Through Him the leper recovered from the leprosy of perversity and ignorance. Through Him, the unchaste and wayward were healed. Through His power, born of Almighty God, the eyes of the blind were opened, and the soul of the sinner sanctified.
Leprosy may be interpreted as any veil that interveneth between man and the recognition of the Lord, his God. Whoso alloweth himself to be shut out from Him is indeed a leper, who shall not be remembered in the Kingdom of God, the Mighty, the All-Praised. We bear witness that through the power of the Word of God every leper was cleansed, every sickness was healed, every human infirmity was banished. He it is Who purified the world. Blessed is the man who, with a face beaming with light, hath turned towards Him.
(Baha’u’llah,
Gleanings from the Writings of Baha’u’llah, XXXVI, p. 85-86)
Of course, it’s up to each person to draw their own conclusions about Baha’u’llah, but if I may I would like to offer this in evidence:
Hereby know ye the Spirit of God: Every spirit that confesseth that Jesus Christ is come in the flesh is of God: And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
(King James Bible, 1 John 4:2-3)
The Bible offers several tests that can be applied. This is one of them, or at least I so believe.