assuming you are, so anyway here's my answer
as a muslim
1) Umar killed muslims before his conversion. Yet he was the caliph who conquered Jerusalem. The point behind that is, Umar was zealous and strong, but he lacked the right guidance. There were many muslims like that who despite coming across as extreme, were perceived of as an assett by the prophet SAW because their zealousness helped protect islam.
2)
Acts 9
3 On his journey, as he was nearing Damascus, a light from the sky suddenly flashed around him. 4 He fell to the ground and heard a voice saying to him, “Saul, Saul, why are you persecuting me?” 5 He said, “Who are you, sir?” The reply came, “I am Jesus, whom you are persecuting. 6 Now get up and go into the city and you will be told what you must do.” 7 The men who were traveling with him stood speechless, for they heard the voice but could see no one. 8
Acts 22
6 “On that journey as I drew near to Damascus, about noon a great light from the sky suddenly shone around me. 7 I fell to the ground and heard a voice saying to me, ‘Saul, Saul, why are you persecuting me?’ 8 I replied, ‘Who are you, sir?’ And he said to me, ‘I am Jesus the Nazorean whom you are persecuting.’ 9 My companions saw the light but did not hear the voice of the one who spoke to me.
key issue here, in Acts 22, it is quoting the words of Paul. Acts 9 is not from Paul directy, it is from the author. This can't be used to suggest Paul was a 'liar' given it isnt his contradiction.
not promoting the website, but the explanation here does seem reasonable
Answers to some of the charges that skeptics and atheist who allege contradictions in the Bible. What was especially good was the way Dr. White dealt with the attacks on Acts 9:7 and 22:9. ” …
apologeticsandagape.wordpress.com
3)
There were 12 original disciples, with Matthias replacing Judas. Then there were many others who were classed as disciples through the 12. Paul wasnt a disciple, nor did he claim to be. He was an apostle (a messenger) of Jesus Christ.
4)
Paul mentions that the devil masquerades as an Angel of Light
the christians also use this style of argument against prophet Mohammad.
here's the thing though, im a firm believer that the demons who play the art of deception, cannot do so without revealing themselves in a very clear manner.
They will always do or say something that shows you what they really are. For example in the mormon religion/sect, there's an 'angel' called moroni that claims it was a man in a past life...
that isnt in line with abrahimic theology.
5) this point im about to make is far more important the above 3.
O you who believe! Be you helpers (in the Cause) of Allah as said 'Îsa (Jesus), son of Maryam (Mary), to the Hawariyyun (the disciples): "Who are my helpers (in the Cause) of Allah?" The Hawariyyun (the disciples) said: "We are Allah's helpers" (i.e. we will strive in His Cause!). Then a group of the Children of Israel believed and a group disbelieved. So We gave power to those who believed against their enemies, and they became the victorious (uppermost).
(سورة الصف, As-Saff, Chapter #61, Verse #14)
the conclusion here is that TRUTH won.
If you think Paul blagged it and was highly influenced by iblees, so much so that he directly tricked the original disciples, then you're going against what the Quran says.
"And behold! I inspired the disciples to have faith in Me and Mine Messenger: they said, 'We have faith, and do thou bear witness that we bow to Allah as Muslims'".
(سورة المائدة, Al-Maaida, Chapter #5, Verse #111)
remember Peters vision? which brings me to my final point
6)
Paul continuously contradicts the teachings of Jesus.
you don't understand the theme, it's the 'path of right action' (the OT) vs the 'path of non-action' (the NT).
the path of right-action is about trying to follow rules through effort to attain righteousness.
the path of non-action is about righteosness becoming an inherent quality and right-action coming through naturally without effort.
the whole 'law vs faiths' topic is based on these 2 different paths. You can look at the muslim world today and see that all over, muslims are sinful despite the Quranic law. Despite reading salat 5 times a day, desptie fasting, despite the iman, muslims have fallen under new depths of sin. The same thing occurred with the jews.
One of Paul's points here was that 'the law was not revealed to CONCEAL Sin, but to Reveal the depths of sin'. So for example Adam and Eve were blameless, until the law of the forbidden fruit was given to them.
when prophet Mohammad chose milk over wine, wine was not forbidden to him, yet his inherent righteousness made him choose milk. Muslims have the law, yet many of us drink alcohol, use drugs.
Another name for 'law' is Islam
another name for 'faith' is Ihsan.
Are you familiar with the hadith on the 3 stages of faith? iman, islam and ihsan.
Jesus was preaching Ihsan to Jews, After that, the message was for all gentiles...which led to Paul.
The gentiles were not under the Mosaic law. Yet they were righteous as long as they were 'believers'.
Paul likened the new christians from the gentiles, to the Abrahimic Partiarchs (from Abraham to Joseph). They lived before the law of Moses, yet they were righteous.
In fact the whole argument from Paul detailed in Romans, only lends massive support to islam.
Afterall, if God saw fit to give the israelites the LAW after they were already righteous, then it makes perfect sense that God would give the gentile 'believers' another LAW. Just like the israelites were 'righteous by faith', they lost their belief in Egypt...and hence God gave them the mosaic Law. likewise the gentiles lost their belief in Rome through the trinitarian doctrine.
It makes even more sense that Jesus, who came to 'fulfill the law' would return to fulfill the Quranic law just as he fulfilled the law of Moses.
Paul's teachings only lead to islam, but most people are too blind to understand that.