Hebrews 7
1This Melchizedek was king of Salem and priest of God Most High.
Stop right there -- here is the reason why Jesus is King and Priest: He is after the order of MELCHIZEDEK; NOT because He was born of Aaronic lineage and Davidic lineage. You confidently affirm things -- things about which you do not know.
He met Abraham returning from the defeat of the kings and blessed him, 2and Abraham gave him a tenth of everything. First, his name means “king of righteousness”; then also, “king of Salem” means “king of peace.” 3Without father or mother, without genealogy, without beginning of days or end of life, like the Son of God he remains a priest forever.
4Just think how great he was: Even the patriarch Abraham gave him a tenth of the plunder! 5Now the law requires the descendants of Levi who become priests to collect a tenth from the people—that is, their brothers—even though their brothers are descended from Abraham. 6This man, however, did not trace his descent from Levi,
Jesus is "after the order of Melchizedek", and DOES NOT TRACE HIS LINEAGE FROM AARON.
yet he collected a tenth from Abraham and blessed him who had the promises. 7And without doubt the lesser person is blessed by the greater. 8In the one case, the tenth is collected by men who die; but in the other case, by him who is declared to be living. 9One might even say that Levi, who collects the tenth, paid the tenth through Abraham, 10because when Melchizedek met Abraham, Levi was still in the body of his ancestor.
11If perfection could have been attained through the Levitical priesthood (for on the basis of it the law was given to the people), why was there still need for another priest to come—one in the order of Melchizedek, not in the order of Aaron?
Jesus DOES NOT need to be of Aaronic descent to be a priest, because a priest of ANOTHER order -- after Melchizedek's order -- was coming.
12For, when there is a change of the priesthood,
Need this text say more?
there must also be a change of the law. 13He of whom these things are said belonged to a different tribe, and no one from that tribe has ever served at the altar. 14For it is clear that our Lord descended from Judah, and in regard to that tribe, Moses said nothing about priests. 15And what we have said is even more clear if another priest like Melchizedek appears, 16one who has become a priest not on the basis of a regulation as to his ancestry but on the basis of the power of an indestructible life. 17For it is declared:
“You are a priest forever,
in the order of Melchizedek.”a
18The former regulation [Levitical/Aaronic priesthood] is set aside because it was weak and useless 19(for the law made nothing perfect), and a better hope is introduced, by which we draw near to God.
20And it was not without an oath! Others became priests without any oath, 21but he became a priest with an oath when God said to him:
“The Lord has sworn
and will not change his mind:
‘You are a priest forever.’”b
22Because of this oath, Jesus has become the guarantee of a better covenant.
A better covenant, a change of priesthood (NOT Aaronic descent, which you attempted to assert without basis in order to establish Miriam's descent)
23Now there have been many of those priests, since death prevented them from continuing in office; 24but because Jesus lives forever, he has a permanent priesthood. 25Therefore he is able to save completelyc those who come to God through him, because he always lives to intercede for them.
26Such a high priest meets our need—one who is holy, blameless, pure, set apart from sinners, exalted above the heavens. 27Unlike the other high priests, he does not need to offer sacrifices day after day, first for his own sins, and then for the sins of the people. He sacrificed for their sins once for all when he offered himself. 28For the law appoints as high priests men who are weak; but the oath, which came after the law, appointed the Son, who has been made perfect forever.
These all prove, again, that the priesthood has changed -- and your assertion that Miriam was of Aaron has no basis (nor is it even called for or necessary) whatsoever.
First of all, every Scripture you just quoted is from the Old Testament.
Second of all, God puts a curse on people who add to or take away from the Torah (and Revelation); this PROVES that the Word can be corrupted -- or else the warning wouldn't exist!
Thirdly, the argument "don't you believe God can keep His Word preserved?" is a baseless one, without any evidence, and based purely on nothing at all. Does God prevent murder? No. Why would He prevent the corrupting of His Word? That makes NO sense at all, and if it were true, it would nullify the verses that curse those who add to or take away from Torah (and Revelation), by the mere fact that it would present a situation where those warnings have NO MERIT, and should not have even been issued, and therefore, it makes God (humanly speaking) into a liar and a fool, for being illogical inasmuch as He has issued illogical decrees (of course, that is impossible).
Garbage.