Saul was persecuting Christians but Jesus said that Saul was persecuting Him. So do not be sad or angry because we are persecuted for Christ' name. Jesus said in Matthew 5:10 Blessed are those who are persecuted for righteousness' sake, for theirs is the kingdom of heaven. John 15:20 Remember the word that I said to you, " A servant is not greater than his master.' If they persecuted Me, they will also persecute you. 1 Peter 4:14 If you are reproached for the name of Christ, blessed are you, for the Spirit of glory and of God rests upon you. On their part He is blasphemed, but on your part He is glorified. So anyone who persecute you for Christ name is not persecuting you but they are persecuting the Lord Jesus Christ.
Remember: Matthew 5:12 Rejoice and be exceedingly glad , for great is your reward in heaven, for they so persecuted the prophets who were before you.