Salam,
Why even bother if four books tell the same story and each story is different. Why even bother when those four books have been chosen from more than 300 books. Why even bother if these books can't even agree on what Jesus really said. The four gospels are clearly the word of man since they all differ, if you depend your faith on account witnesses then I don't know about all that. You will tell me what matters is that he died and resurrected? well then why other people thought differently at that time? History is written by the winners, and those who favored that Jesus died and resurrected won the battle and ignored thousands of scriptures that believed in Jesus as a prophet and believed he never died.
You always find ways to explain the complicated and make it even more complicated. The holy spirit can't speak of himself? and he is God, how can this make any sense. A typical explanation: We don't understand God that's why we accept that neither Jesus nor the holy spirit can speak of themselves but they are still the same God. For God's sake how does this make any sense.
Why are some muslims vehemently trying to find errors in our book when they fail to realise the errors in their book.
Typical way when you run away from answers.
Bottom line, if you find an error in the word of God then it's not the word of God, and it is not the word of God because the four gospels you claim to be the word of God are totally dependent on account witnesses.
Salam