If I took it from the same prospective that you have, then if I don’t believe in Jesus, I can say that Jesus stole from Moses. Be samrt a bit, it’s not as you think, all the prophets came with messages on the same goal which is worshipping God. Quran said that Christians when they lost the copies of the gospel, they changed the word of God while they’re trying to retrieve, that’s why islam is exist. TO CORRECT Meanwhile, your book has plenty of contradictions in both Old and New Testament