Jesus may have been of the line of David through Jeconiah. I will make no claim as to the accuracy of the genealogies listed in the gospels.
You asked for me to show how Jesus is the fruit of the patriarch David's body. Well, according to your own intrepretation of the Bible, He is.
If he is of the line of Jeconiah, then he is excluded from contention.
I'm just here to inform you that, in addition to haveing a few things wrong about your intrepretation,
Such as?
this Man Jesus is sitting on the throne of David right now.
Really? Where is he?