According to Acts 11, who were the first to be called Christians?

Les explains from Acts 11 that the Gentile believers at Antioch were first called Christians. He contrasts them with the Jewish believers primarily centered around Jerusalem, noting that the Word of God never calls those Jewish believers Christians. He says Acts 15 does not do so either, but Acts 11 does for the Gentile believers at Antioch. Les insists this is what the Book says, even though many theologians ignore that statement and go back and call the Jewish believers Christians. He describes those Jewish believers as under the covenant promises, like John the Baptist's followers, those who came under Christ's ministry, and those saved on Pentecost. He adds that a person cannot be called a Christian who has not been saved according to the Gospel of the grace of God: that Christ died for our sins, rose from the dead, and ascended.