Obviously, Jews reject Christianity because of things allegedly said and done by Jesus himself. When I was taught the "truth" about the Bible by Christians, they started at the beginning... their beginning, the NT and worked backwards... only using verses from the Hebrew Scriptures that suited their needs.
They showed me how the devil, as the serpent of old, tempted Eve. They showed me how he, as Lucifer, fell from heaven. Then they showed me how it was prophesied that Jesus would be born of a virgin. But, when my Christian friends "backslid" into drugs, women and alcohol, I had to face my doubts... Did I really believe all this Jesus stuff? I decided to ask a Jew why he didn't believe Jesus was the true Messiah. He showed me. He gave me a couple of books to read. It became obvious that Jesus did not fulfill the real prophecies that the Messiah was to accomplish. I saw how Matthew and others misquoted verses or took them way out of context to make up prophecies that were fulfilled by Jesus.
One of the others was Paul. My favorite misquote of his is when in Romans 10 he takes part of Deut. 30:14 to say that the word of faith is what is near you, that confessing that Jesus is Lord, you will be saved. But then I read what it said in Deut. and it said to love the Lord your God and to keep His commandments... Just a slight twist. But Christians have no problem with this, because, supposedly, God, the Holy Spirit, guided Paul. Well then, who's to say that the Spirit of God didn't guide Mohammed or Baha'u'llah, or, who knows, maybe even Joseph Smith? Ironically, the Christian will say "No" that those guys misquote or distort the Scriptures. So I don't get it? It's alright for the gospel writers and Paul to do that, but not alright for those that came after them to take Bible verses out of context and use them to "prove" their religion?
I mentioned Baha'u'llah, because, for a couple of years. I joined the Baha'i Faith. They had no problem with Paul. They simply disregarded anything he said that disagreed with their beliefs with statements like... "Well, that was the old covenant. God has established a new covenant with us." Or, "The Bible was written by men. Paul was a man, not the prophet. His doctrines are his interpretations of what Jesus taught. Our Book was written by the Prophet himself. It is the "true" word of God." You know, it's funny how anybody can make the old words of God somehow corrupted or to not mean what they say, and therefore, they make it, essentially, null and void. But what's hilarious, is that at the same time, they use them to prove their new religion?
Anyway, I think Paul is easily ignored. If he says something that my beliefs don't agree with, well then he is the one that's wrong, not me and my religion. However, for the Christian, it's me that is wrong. But look at what do they do. They do the same thing. They ignore my prophet. What is up with that? How can they even justify doing that with learning and listening to what my prophet and religion teaches? If they did, they'd see... that my prophet is the one that is right, and he can prove it. He has parts of several Bible verses that point to him as being the promised one. I think even one from Paul.