Is there secular documentation that the Apostle Paul had persicuted early Christians?

Answer 1

--Sorry I missed your secular request--Possibly in the records of Josephas , I will research!

--BRIEF REFERENCES:

*** w99 6/15 pp. 30-31 Why Did Saul Persecute Christians? ***

Considering the schooling Saul received under Gamaliel and the powers he now wielded, some scholars believe that he had progressed from being a mere student of the Law to the point of exercising a measure of authority in Judaism. One supposed, for example, that Saul may have become a teacher in a Jerusalem synagogue. However, what is meant by Saul’s ‘casting his vote’—whether as a member of a court or as one expressing his moral support for the executions of Christians—we cannot be certain.

Since at the outset all Christians were Jews or Jewish proselytes, Saul apparently understood Christianity to be an apostate movement within Judaism, and he considered it the business of official Judaism to set its adherents straight. “It is not likely,” says SCHOLAR(my caps) Arland J. Hultgren, “that Paul the persecutor would have opposed Christianity because he saw it as a religion outside of Judaism, a competitor. The Christian movement would have been seen by him and others as subject yet to Jewish authority.” His intention then was to force wayward Jews to recant and return to orthodoxy, using all available means. (Acts 26:11) One method open to him was imprisonment. Another was flogging in the synagogues, a common means of discipline that could be administered as a chastisement for disobedience against rabbinical authority in any local court of three judges."

-- The following references from the greatest of historical records, should carry the most weight!

(Acts 8:1-3) 8 Saul, for his part, was approving of the murder of him. On that day great persecution arose against the congregation that was in Jerusalem; all except the apostles were scattered throughout the regions of Ju·de´a and Sa·mar´i·a. 2 But reverent men carried Stephen to the burial, and they made a great lamentation over him. 3 Saul, though, began to deal outrageously with the congregation. Invading one house after another and, dragging out both men and women, he would turn them over to prison.".......

(Acts 9:1-2) 9 But Saul, still breathing threat and murder against the disciples of the Lord, went to the high priest 2 and asked him for letters to the synagogues in Damascus, in order that he might bring bound to Jerusalem any whom he found who belonged to The Way, both men and women."

--Jesus, as a spirit person , after having blinded Saul(Paul) temporaraly had this dialogue with him:

(Acts 9:3-9) 3 Now as he was traveling he approached Damascus, when suddenly a light from heaven flashed around him, 4 and he fell to the ground and heard a voice say to him: “Saul, Saul, why are you persecuting me?” 5 He said: “Who are you, Lord?” He said: “I am Jesus, whom you are persecuting. 6 Nevertheless, rise and enter into the city, and what you must do will be told you.” 7 Now the men that were journeying with him were standing speechless, hearing, indeed, the sound of a voice, but not beholding any man. 8 But Saul got up from the ground, and though his eyes were opened he was seeing nothing. So they led him by the hand and conducted him into Damascus. 9 And for three days he did not see anything, and he neither ate nor drank.

--Paul here admits how hateful he was to the early congregation:

(Philippians 3:4-6) . . .If any other man thinks he has grounds for confidence in the flesh, I the more so: 5 circumcised the eighth day, out of the family stock of Israel, of the tribe of Benjamin, a Hebrew [born] from Hebrews; as respects law, a Pharisee; 6 as respects zeal, persecuting the congregation; as respects righteousness that is by means of law, one who proved himself blameless."

--Most likely there is more, hope the reference I made might be of help!