Has God ever changed the way the Message has been delivered to mankind? There has always been a Declaration, a given Message, the rejection, then the result, has there not?
I think the greatest challenge for people of all Faiths is to consider that they could over time have some wrong concepts develop, and that error of thought continues for generations, each generation holding to that past hope. Yet still other Faiths are born and show their capacity in the same God given love that makes great Nations and then they too, for the same reasons, fail to provide the power of guidance they once had. This is because man does add meaning to scripture that is reflecting the material world and not that of the Spirit that was Jesus the Christ.
In saying that, I am not saying people are bad, as many do this in the strongest Love they see is possible. I am offing it is a misguided Love. We need to look for what was of Jesus Christ, and not is from what men think Jesus offered. IMHO
So if we did get it wrong, who will. Sort that out, but another God given Messenger, and Jesus Christ said many would come and give a false message, but also told us how to judge True Prophets and to embrace them.
Verses such as these.
DEUTERONOMY 18:22 "when a prophet speaketh in the name of the Lord, if the thing follow not nor come to pass, that is the thing which the Lord hath not spoken, but the prophet hath spoken it presumptuously; thou shalt not be afraid of him."
So if one does speak and it does come to pass, then Logically we know it was spoken in Truth.
As to how a true prophet knows who they are.
Numbers 12:6 " And he said, “Hear my words: If there is a prophet among you, I the Lord make myself known to him in a vision; I speak with him in a dream."
Of course many more passages about how determine true from false.
I offer there has been 3 Messages since Jesus that are supported by Numbers 12:6nd all true Prophet passages.
They are the Messages of Muhammad, the Bab and Baha'u'llah. All else would not be supported by Numbers 12:6 and all true prophet passages. IMHO
Regards Tony