You are exaclty on point when you talk about the Biblical Paul. Please allow me to add the following:

FIRST REASON FOR NOT BELIEVING ANYTHING THAT PAUL SAYS

Paul says: “Doth not even nature itself teach you, that, if a man have long hair, it is a shame unto him?” (1 Corinthians 11:14).

It is obvious that Paul has never heard of the African lion and other animals where the male of the species is adorned with longer hair than the female. It is also obvious that Paul has never read the scripture, for if he had, he would be aware of the following versus which show that long hair is not a disgrace, but is in fact a sign of holiness!!

Numbers 1:2, 5: 2: "Speak unto the children of Israel, and say unto them, When either man or woman shall separate themselves to vow a vow of a Nazarite, to separate themselves unto the LORD: All the days of the vow of his separation there shall no razor come upon his head: until the days be fulfilled, in the which he separateth himself unto the LORD, he shall be holy, and shall let the locks of the hair of his head grow."

Judges 13:5: "For, lo, thou shalt conceive, and bear a son; and no razor shall come on his head: for the child shall be a Nazarite unto God from the womb: and he shall begin to deliver Israel out of the hand of the Philistines."

I Samuel 1:11 "And she vowed a vow, and said, O LORD of hosts, if thou wilt indeed look on the affliction of thine handmaid, and remember me, and not forget thine handmaid, but wilt give unto thine handmaid a man child, then I will give him unto the LORD all the days of his life, and there shall no razor come upon his head."

SECOND REASON FOR NOT BELIEVING ANYTHING PAUL SAYS

Paul can’t even get his own story straight. Describing his revelation on the road to Damascus, Paul gives two accounts:

“And he [Paul] fell to the earth, and heard a voice saying unto him, Saul, Saul, why persecutest thou me? And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks. And he trembling and astonished said, Lord, what wilt thou have me to do? And the Lord said unto him, Arise, and go into the city, and it shall be told thee what thou must do. And the men which journeyed with him stood speechless, hearing a voice, but seeing no man” (Acts 9:4-7).

“And I fell unto the ground, and heard a voice saying unto me, Saul, Saul, why persecutest thou me? And I answered, Who art thou, Lord? And he said unto me, I am Jesus of Nazareth, whom thou persecutest. And they that were with me saw indeed the light, and were afraid; but they heard not the voice of him that spake to me” (Acts 22:7-9).

According to the first story, the men with Paul heard a voice but did not see a man; however, according to the second story, the men with Paul saw a light but did not hear a voice. Either Paul was drunk or the entire story is fabricated!!

THIRD REASON FOR NOT BELIEVING ANYTHING PAUL SAYS

Paul says “For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures: And that he was seen of Cephas, then of the twelve: After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep” (1 Corinthians 15:3-6).

Paul makes two mistakes: First of all, there is no mention in the scriptures of 500 witnesses to Christ’s resurrection. Second, Christ could not have been seen of “the twelve” since there were only 11 disciples at the time of his resurrection. Judas died prior to the resurrection, and Matthias was not appointed to fill his position until after Christ’s ascension (Acts 1:26). Paul was completely ignorant about the scriptures concerning Christ’s resurrection and ascension.

FOURTH REASON FOR NOT BELIEVING ANYTHING PAUL SAYS

And finally Paul says: “Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ. And this I say, that the covenant, that was confirmed before of God in Christ, the law [given to Moses], which was four hundred and thirty years after, cannot disannul, that it should make the promise of none effect” (Galatians 3:16-17).

Paul claims that there were 430 years from the time the promise was given to Abraham until the law was given to Moses. However, Paul cannot count, and wasn’t even close. Let me tell you what the Scriptures really say:

The promise was given to Abraham when he was 99 years old (Genesis 17:1:2).

Isaac was born exactly 1 year later (Genesis 17:21).

Isaac was 60 years old when Jacob was born (Genesis 25:26).

Jacob was 130 when he and his tribe first went into Egypt (Genesis 47:8-9, 28).

The Israelites (Jacob’s tribe) journeyed in Egypt for 430 years (Exodus 12:40). The Bible also says they were afflicted for 400 years (Genesis 15:13-14); and it is apparent that they were not afflicted during the entire 430 years they spent in Egypt.

So how long was it between the promise to Abraham and the law given to Moses:
Computation: 1 + 60 + 130 + 430 equals 621 years, not 430 as Paul claims.

FIFTH REASON FOR NOT BELEIVING ANYTHING PAUL SAYS

Paul says: “And after that he gave unto them judges about the space of four hundred and fifty years, until Samuel the prophet” (Acts 13:20).

However, the Old Testament, which Paul apparently did not read, says: “And it came to pass in the four hundred and eightieth year after the children of Israel were come out of the land of Egypt, in the fourth year of Solomon's reign over Israel..” (1 Kings 6:1).

Any third grade math student can see the problem with this one: Not counting the last four years of Solomon’s reign; there were only 476 years for all previous kings as well as previous judges to rule. But Saul and David ruled for a total of 80 years, which leaves only 396 years for judges to rule, not 450 years as Paul claimed.

Note: The scriptures say David ruled for 40 years: “David was thirty years old when he began to reign, and he reigned forty years” (2 Samuel 5:4) The scriptures also say Saul ruled for 40 years: “And afterward they desired a king: and God gave unto them Saul the son of Cis, a man of the tribe of Benjamin, by the space of forty years” (Acts 13:21).

EIGHTY TWO MORE REASONS WHY YOU SHOULD NOT BELIEVE ANYTHING PAUL SAYS:

I will not list them for you, however I will tell you where you can find them: Biblical Errancy, A Reference Guide, by C. Dennis McKinsey, pages 553-621.