This whole area of Baha'i theology sounds like double talk to me and is usually given in language that is not clear and could be taken in more than one way. This is a manner of deception imo.
Christ indicates that the Messengers are of God, as we Know Christ translated means the "Annointed One". Jesus was Annointed with the Holy Spirit. It is the Messengers that are Annointed, the 'Christ'. No other human has this station but the Messengers.
It sounds like you are defining "Christ" as a station. In the Bible the Christ is a person, Jesus, and the return of Christ is the return of that person.
How do you get the "return of Christ" to be a different person?
The Bible offers how we must find the Holy Spirit, we must be born again from the human condition, from the flesh into the Spirit that was Jesus 'Christ', who came in the Station of the Son.
So yes it is the same Spirit in Jesus's and Baha'u'llah, it is the same Spirit that Annointed Krishna, Zoroaster, Moses, Abraham, Buddha, all the Prophets, Muhammad and the Bab.
This Spirit is the same Spirit that is in those Christians who have been born again. It unites with our spirit and makes us into a new creation. But of course Jesus has that Spirit without measure. This Spirit is the Holy Spirit, the Spirit of God. It sounds like you think that the different Messengers have different measures of this Spirit.
So anyway, you sound as if you are saying that Jesus was anointed by this Spirit to be the Christ as was Baha'u'llah and etc.
So each of them are Christs after they are anointed by that Spirit.
If it is this Spirit which came to and anointed Baha'u'llah to be the return of Christ, how does that work when that Spirit was/is not Christ, Jesus?
It obviously is the Spirit that is what
returned and this Spirit does not come in the flesh/become a man and did not become a man when Jesus was anointed at His baptism by this Spirit.
If you want to say that Jesus was the Christ before being anointed at Baptism then you can say that He came in the flesh/became a man.
But of course the Bible clearly states that Jesus would return, how is this covered by what you say without denying it, if indeed you want to say that you believe the Bible?
If the Spirit returned then that is not Jesus, that is not the return of Jesus and is not the return of Christ since the Spirit is not Christ.
I hope you can see your dilemmas. Or is it just my misunderstandings?
The Messengers are eternal. All of them exist as Spiritual Entities in the Light of the the Holy Spirit. All of them are are given of God, born in the flesh to offer a Message from God and return to rule for all time. All their Names are but of One Holy Spirit, given of One God, All of them are the same light. It is God that commissions the Message and the Intensity of that light to Humanity.
So in this age, Christ is Baha’u’llah (Glory of God), God given, in the Station of the Father, Christ has returned, as promised with a New Name, a name that only a few will receive.
Is Baha'u'llah Christ because he has received this Spirit of Christ? Is this Spirit the return of Christ and so is Christ, who does not ever become a human/come in the flesh?
Baha'u'llah offers we are not able to separate the Messengers, to deny Jesus Christ is to deny all the Messengers, to deny Muhammad is to deny Jesus as the Christ, as Muhammad was also Christ, Annointed by God with the Holy Spirit to give a Message to Humanity.
Was the anointing given to Baha'u'llah and to Muhammad who were already Christs before their anointing, or was the anointing for them to become the Christs? (notice I say multiple Christs, not the same one).
This is how we determine a False Prophet, as Jesus's said only a True Prophet can speak from God.
Deuteronomy 18:22 "If what a prophet proclaims in the name of the LORD does not take place or come true, that is a message the LORD has not spoken. That prophet has spoken presumptuously, so do not be alarmed."
Deut 18:22 it is that a prediction does not come to pass which is the test of a false prophet, and I don't think that it was talking about the Baha'i definition of prophet, it was talking about all prophets, including Amos, Isaiah, Nathan etc.
I don't see how Baha'i, Baha'u'llah's claim to be speaking from God as determining that he was not a false prophet. False prophets claim that.