I am going to answer only the part I understood of your post above. Yes, I am tired of the way the NT uses a Jew to preach against Judaism. I consider an arrogance to pick up a Jew and to preach against his Faith which was Judaism
I understand that, when King David became king he faced the challenge of dividing the inheritance of Israel between the tribes, as had been pre promised, an never exceciuted, in fact it was made law that the children be told, an each generation of children shall be schooled an teach those after them.
After much fighting over the inheritance ruling.
King David measured an divided them inherance by line.
The news of the lines went out to the whole world end, The news, he had set up a tabnackles to the sun.
David made them dwel in their tents within inheritance.
David preached of all the marvellous things moses did in the sight of his people.
Turning water to blood, Parting the Red Sea, feeding them by commanding the cloud to open, Angels food to rain down from above, stricking rocks an providing water..an many other things did moses do.
David understood that these miricules that Moses performed I frount of his people bare unusual Friut, they sinned even more against him,
Therefore their days did he consume in vanity, and their years in trouble.
Moses reaction to his rebellious people was:
When he slew them, then they sought him: and they returned and enquired early after God.
David being not a man that would sit on the throne an rule this way. Began to rule an make his own statues, which did not please the house of Moses, his desendents.
The kingdoms of David did live in peace for many years, the tribes an there beliefs remained within the line of there inheritance. Forbidden to cause strife with their brothers.
David purchased his inheritance with his right arm.
Latter the kingdoms were turned upside down, certian disgruntled Tribes of Israel wanting Davids inheritance, even making alliances with others to over throw the estate. In which the alliance stabbed them an took all!
An jesus...well he had his graments ripped an torn, an his gene argued over. His birth right became angel like.. What a mess.