His claim is based on taking the passage in question out of context of the New Testament. If there were no more priests, then why does St. Paul write the following in Romans 15: 15] But on some points I have written to you very boldly by way of reminder, because of the grace given me by God 16] to be a minister of Christ Jesus to the Gentiles in the priestly service of the gospel of God, so that the offering of the Gentiles may be acceptable, sanctified by the Holy Spirit. (Emphasis mine)**
**Even the n-C NASB reads 15 But I have written very boldly to you on some points so as to remind you again, because of the grace that was given me from God, 16 to be a minister of Christ Jesus to the Gentiles, ministering as a priest the gospel of God, so that my offering of the Gentiles may become acceptable, sanctified by the Holy Spirit.
And Young’s Literal Translation (YLT) 15 and the more boldly I did write to you, brethren, in part, as putting you in mind, because of the grace that is given to me by God, 16 for my being a servant of Jesus Christ to the nations, acting as priest in the good news of God, that the offering up of the nations may become acceptable, sanctified by the Holy Spirit.