Priesthood

The royal priesthood isn't misunderstood to those who understand the Kingdom. It goes like this...

John the Baptist was the greatest prophet ever born of a woman, but the Law and the prophets ended with him. From that time on Jesus brought the Kingdom of God with Him. Jesus says "the least" in the Kingdom is greater the the greatest prophet.

Matthew 11:11 NKJV

“Assuredly, I say to you, among those born of women there has not risen one greater than John the Baptist; but he who is least in the kingdom of heaven is greater than he."

Luke 16:16 NKJV

“The law and the prophets were until John. Since that time the kingdom of God has been preached, and everyone is pressing into it."

This is because when God fills a person with the Holy Spirit, they become one with God. Every single believer is an ambassador of Christ, a royal priest, and a son of the living God.

1 Peter 2:9 KJV

But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light:

Revelation 1:5-6 NKJV

To Him who loved us and washed us from our sins in His own blood, and has made us kings and priests to His God and Father, to Him be glory and dominion forever and ever. Amen.

Revelation 5:10 NKJV

"And have made us kings and priests to our God; And we shall reign on the earth.”

Jeremiah 31:33-34 NKJV

But this is the covenant that I will make with the house of Israel after those days, says the Lord : I will put My law in their minds, and write it on their hearts; and I will be their God, and they shall be My people. No more shall every man teach his neighbor, and every man his brother, saying, ‘Know the Lord ,’ for they all shall know Me, from the least of them to the greatest of them, says the Lord . For I will forgive their iniquity, and their sin I will remember no more.”