You cannot "prove" anything with regard to God....that is why we need "faith". Faith does not require proof (Hebrews 11:1) ...it requires
conviction. We all have to find our own, based on what we accept as truth.....why we accept it tells God a lot about who we are.
Christians cannot accept the teachings of anyone but Jesus Christ. We have no prophets after him. If their prophet is believed to be the returned Messiah, then where are the fulfilled Messianic promises? Where is the end of pain, suffering and death? (Revelation 21:2-4)
Where is the paradise that was foretold by the Jewish prophets like Isaiah? Where is the end of war? (Isaiah 11:1-9; Isaiah 65:21-25; Isaiah 2:2-4)
Or Psalm 46:8-9....
"Come and witness the activities of Jehovah,
How he has done astonishing things on the earth.
9 He is bringing an end to wars throughout the earth.
He breaks the bow and shatters the spear;
He burns the military wagons with fire."
Where do we see that? When have we seen a time when humans are not warring with one another? It seems to be consistently increasing.
And the weaponry has just become more indiscriminate and lethal.
With regard to Bahá'u’lláh.....is the Messiah to return, only to die twice? His sacrificial death in the first century was the ransom paid to redeem mankind....he was not going to return in the flesh and then lead people in a different path, trying to unite all religions and give credence to false prophets. Jehovah kept his people strictly separated from the nations who worshipped other gods.
Christ's return as judge of all the earth was going to be spectacular, accompanied by his angelic forces, to deal with disobedient mankind who followed the devil into false worship....and to reward those who remained faithful to the truth (sheep and goats).....it was to be the end of the age....and the beginning of the "new earth" under the "new heavens".....God's Kingdom. (2 Peter 3:13)
If you see the criteria listed for a true prophet...."
The true prophet would speak in Jehovah’s name;
the things foretold would come to pass (
Deuteronomy 18:20-22); and
his prophesying must promote true worship, being in harmony with God’s revealed word and commandments (
Deuteronomy 13:1-4)"
1) Bahá'u’lláh did not speak in the name of YHWH. (Yahweh, Jehovah)
2) If what he said did come to pass, then that is a matter of interpretation.
3) His prophesies did not harmonize with the revealed word of God.
Baha'i sprang from Islam, not Judaism. The nation that God chose descended from Isaac not Ishmael. Jesus himself said that salvation originates with the Jews.....it was not to end with them however.
I do not believe that you can ever harmonize all the false religion in the world and meld them into one universal plan for the human race...that to me is something that the devil would promote....not because universal harmony is itself a bad thing, but because of the compromise involved in facilitating such a movement. It might sound good in theory, but it fights with everything the Bible teaches and it means that no one has to take a stand for God amid false religious opposers. It would mean that God didn't really mean what he said when he forbade Israel to adopt the worship of the Canaanites. He commanded that they remain separated from those beliefs and practices...but Israel disobeyed their God and immersed themselves in those false religious practices. God punished them severely for doing that...so why would Jehovah send a prophet into the world to negate everything that he taught his people....going against the teachings of his own son?
You will notice something interesting with the first requirement of a prophet listed above.....the importance of Jehovah's name. In his model prayer, the first thing that Jesus mentioned was the sanctification of God's name. (Matthew 6:9) Out of the three "Abrahamic faiths still on earth to this day...what do you see with regard to God's divine name...YHWH (Jehovah in English)?
The Jews cannot utter it, so the use of the name is lost to history because no one really knows how to pronounce it now. So "Hasham" (literally meaning "the name") is as close as they can get to the divine name. "Adonai" (LORD) is the substitute when reading their scripture though YHWH is written there. It seems odd that the Bible writers had no such hesitation to use God's name freely and reverently throughout their writings.....so why was there a decision made to remove God's name from their speech? Their excuse for this is not valid when you consult their scripture.
Islam calls God "Allah" which again simply means "LORD".....so again God remains nameless.
Christendom adopted the Jewish tradition of leaving God's name out of their vocabulary as well, and its not found in most of their Bible translations either......and because Jesus is also called "Lord" they have confused him with his Father and made them into one god, throwing in the holy spirit for good measure. So it seems that a nameless "LORD" is worshipped by all three.
Jehovah's Witnesses sought to rectify that situation and to restore God's name to its rightful place in scripture. We use God's name freely and reverently in whatever language is spoken by us, because God is the originator of language and recognizes his name in any tongue. It isn't how you say it...its the identity of the true God who is distinguished in the scriptures by his unique name. To us there has to be a clear distinction between the true God and his prophets and the many false gods and their prophets. We have no trouble making that distinction because we see it as something God has done all through Bible history. There can be no amalgamation. (2 Corinthians 6:14-18)