Predicted the arrival of the Messiah and also predicts his second coming.
That is a given and does nothing to address the question of whether or not the Harbinger is based on prophecy or extrapolation. I think it is one guys take on lining up what happened and what is happening with no biblical basis for the link.
I get it was prophecy that was realized for the Jews in their history. Does it say anywhere that it will repeat or that it remains applicable? I don’t think it does.
If you follow or accept the line of reasoning for the Harbinger, every single OT prophecy remains in effect or can be activated by repeating specific actions. I don’t think it works that way. I have never heard it put forth by anyone. There is a new Covenant that controls.
Well said Errant!