If one religion believes that Jesus is the son of God and was sent by God to atone for the sins of this world while others do not believe this to be true, then if it is true that Jesus in fact was the son of God and that he truly was sent to atone for the sins of this world, then those other religions who do not believe this are false religions.
If one religion has the truth that Jesus is the son of God and was sent by God to atone for the sins of this world and this same Jesus established a church while he was upon the earth, you would think that the organization of the church that Jesus established would be emulated in his true church today.
Ephesians 4:11-14
11 And he
gave some,
apostles; and some,
prophets; and some,
evangelists; and some,
pastors and
teachers;
12 For the
perfecting of the saints, for the work of the ministry, for the
edifying of the body of Christ:
13 Till we all come in the
unity of the faith, and of the
knowledge of the Son of God, unto a
perfect man, unto the measure of the stature of the fulness of Christ:
14 That we henceforth be no more
children, tossed to and fro, and carried about with every wind of
doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
Here we are told that Christ's church consists of apostles, prophets, evangelists, pastors and teachers. Their job in the church is to help in perfecting the saints, to do the work of the ministry, and to edify the body of Christ (the church). It is established this way until we all come to the unity of the faith and the knowledge of the Son of God, unto a perfect man, unto the measure and stature of the fulness of Christ.
In other words, you should be able to find these offices of the priesthood within the church of Jesus Christ today.