She does not know the difference between an ambassador and a priest.
Peter says we are a priesthood.
1 Peter 2
Wherefore laying aside all malice, and all guile, and hypocrisies, and envies, and all evil speakings, 2 as newborn babes, desire the sincere milk of the word, that ye may grow thereby: 3 if so be ye have tasted that the Lord is gracious.
4 To whom coming, as unto a living stone, disallowed indeed of men, but chosen of God, and precious, 5 ye also, as lively stones, are built up a spiritual house, an holy priesthood, to offer up spiritual sacrifices, acceptable to God by Jesus Christ. 6 Wherefore also it is contained in the scripture, Behold, I lay in Sion a chief corner stone, elect, precious: and he that believeth on him shall not be confounded. 7 Unto you therefore which believe he is precious: but unto them which be disobedient, the stone which the builders disallowed, the same is made the head of the corner, 8 and a stone of stumbling, and a rock of offence, even to them which stumble at the word, being disobedient: whereunto also they were appointed.
9 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: 10 which in time past were not a people, but are now the people of God: which had not obtained mercy, but now have obtained mercy.
Peter is quoting Paul:
Rom 12
1 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
Hebrews 13:15
By him therefore let us offer the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to his name.
Eph 5
18 And be not drunk with wine, wherein is excess; but be filled with the Spirit; 19 speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord; 20 giving thanks always for all things unto God and the Father in the name of our Lord Jesus Christ;
Colossians 3:16
Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord.
priesthood
G2406
ἱεράτευμα
hierateuma
hee-er-at'-yoo-mah
From G2407; the priestly fraternity, that is, a sacerdotal order (figuratively): - priesthood.
G2409
ἱερεύς
hiereus
hee-er-yooce'
From G2413; a priest (literally or figuratively): - (high) priest.
G2407
ἱερατεύω
hierateuō
hee-er-at-yoo'-o
Prolongation from G2409; to be a priest, that is, perform his functions: - execute the priest’s office.
G2413
ἱερός
hieros
hee-er-os'
Of uncertain affinity; sacred: - holy.