FanOfU2 in Christ,
Please note that both the Old and New Testaments share much in common. The OT covenants are a foreshadowing of the New Covenant. 1 Peter 2:9 says,
“But you are a chosen race, a royal priesthood, a holy nation, God’s own people,”
Please compare this verse to the following from the OT.
Now therefore, if you will obey my voice and keep my covenant, you shall be my own possession among all peoples; for all the earth is mine, and you shall be to me a kingdom of priests and a holy nation. These are the words which you shall speak to the children of Israel."
Obviously, the Jews were a priestly people in the Old Covenant just as Christians are a priestly people in the New Covenant. The declaration that we are a “priestly people” does not negate the ministerial priesthood. After God makes the declaration in Exodus concerning the people as a kingdom of priests, he then tells Moses the following:
And also let the priests who come near to the Lord consecrate themselves, lest the Lord break out upon them." And Moses said to the Lord, “The people cannot come up to Mount Sinai; for thou thyself didst charge us, saying, ‘Set bounds about the mountain, and consecrate it.’” And the Lord said to him, “Go down, and come up bringing Aaron with you; but do not let the priests and the people break through to come up to the Lord, lest he break out against them.” So Moses went down to the people and told them.
"THEN BRING near to you Aaron your brother, and his sons with him, from among the people of Israel, to serve me as priests–Aaron and Aaron’s sons, Nadab and Abihu, Eleazar and Ithamar. And you shall make holy garments for Aaron your brother, for glory and for beauty. And you shall speak to all who have ability, whom I have endowed with an able mind, that they make Aaron’s garments to consecrate him for my priesthood.
And you shall put them upon Aaron your brother, and upon his sons with him, and shall anoint them and ordain them and consecrate them, that they may serve me as priests.
Likewise in the New Covenant we have deacons, presbyters/priests, and bishops. This is the ministerial priesthood of the New Covenant.
In the OT we read about Korah’s rebellion in Numbers 16:1-33. It says in part:
"NOW KORAH the son of Izhar, son of Kohath, son of Levi, and Dathan and Abiram the sons of Eliab, and On the son of Peleth, sons of Reuben, took men; and they rose up before Moses, with a number of the people of Israel, two hundred and fifty leaders of the congregation, chosen from the assembly, well-known men; and they assembled themselves together against Moses and against Aaron, and said to them, “You have gone too far! For all the congregation are holy, every one of them, and the Lord is among them; why then do you exalt yourselves above the assembly of the Lord?” When Moses heard it, he fell on his face;
Moses responds to Korah with this]
And would you seek the priesthood also? Therefore it is against the Lord that you and all your company have gathered together; what is Aaron that you murmur against him?"
Later in the narrative we read that God destroys Korah and his followers that attempted to usurp the ministerial priesthood. Likewise there is a warning in the NT. In Jude 1:11-13 it says,
“Woe to them! For they walk in the way of Cain, and abandon themselves for the sake of gain to Balaam’s error, and perish in Korah’s rebellion.”
The only conclusion that can be drawn from the book of Jude concerning Korah’s rebellion is that there are those that would attempt to usurp the ministerial priesthood of the New Covenant just as Korah did in the Old Covenant. Any denial of the proper place of the ministerial priesthood in the New Covenant is synonymous with Korah’s rebellion.
I hope this helps.