Allow me to clarify: I am one who DOES NOT "BELIEVE" what is possibly true, because I "know" what is true. There is a difference. Which is something God has done with some, a few, down through all of recorded history. This is not a claim on my part, but a witness: He revealed Himself to me, and guides me.
As for Christians having conflict about what they "believe", that is God's doing. Before the world began His plan was to divide the good from the evil, just as in the beginning He divided the light from the darkness. He has made manifest what was before the foundation of the world, and revealed it--hid it in plain sight--for those who, within their makeup--would have eyes to see it. What we all once were, whether good or evil, we now walk out--everything good and evil is exposed--as evidence for all to see. Then comes His Judgement.
The purpose of divided beliefs among Christians, is because we too are being exposed--divided--the good from the evil. But also, because we each have a purpose--a job to do in His rebuilding of all things--that by doing, we become part of Him by our actions. He has put feet to every purpose and person. In this way, we--the good and the evil--all do what we do according to what we are and shall be for eternity following this short lifetime. Wherein, He has placed a caveat--that whoever wishes to change, can change by their own freewill. Which cannot be done ha

eartedly, by His insistence.
Again, this is not what I "believe", but is what I have been given to say--His words--not mine.