Apostles
Later in the Gospel narratives the twelve apostles are described as having been commissioned to preach the Gospel to "all the nations", regardless of whether Jew or Gentile. Paul emphasized the important role of the apostles in the church of God when he said that the household of God is "built upon the foundation of apostles and prophets, Christ Jesus himself being the cornerstone".
Although not one of the apostles commissioned during the life of Jesus, Paul, a Jew named Saul of Tarsus, claimed a special commission from the risen Jesus and is considered "the apostle of the Gentiles", for his missions to spread the gospel message after his conversion. In his writings, the epistles to Christian churches throughout the Levant, Paul did not restrict the term "apostle" to the Twelve, and often refers to his mentor Barnabas as an apostle. The restricted usage appears in the Revelation to John.
Sicarii
Judas Iscariot, one of the Twelve Apostles of Jesus according to the New Testament, was believed to be a sicarius. This opinion is objected to by modern historians, mainly because Josephus in "The War of the Hebrews" (2:254–7) mentions the appearance of the Sicarii as a new phenomenon during the procuratorships of Felix (52–60 AD), having no apparent relation with the group called Sicarii by Romans at times of Quirinius. The 2nd century compendium of Jewish oral law, the Mishnah ("Makhshirin" 1:6), mentions the word "sikrin" (), perhaps related to Sicarii, and which is explained by the early rabbinic commentators as being related to the (= robbers), and to government personnel involved with implementing the laws of Sicaricon. Maimonides, in his Mishnah Commentary ("Makhshirin" 1:6), explains the same word "sikrin" as meaning "people who harass and who are disposed to being violent."