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The Bible is not worthless and it certainly ain't corrupted. Ancient manuscripts of the Bible found in the Nag Hammadi library carry the same message as the Latin Vulgate or the modern Catholic Bible. There's no significant change.
Furthermore, the gospels were written within 30 years of Christ's resurrection while the Quran's recitations weren't written down until a much much more later date and many Islamic scholars had wrangled their minds on how to interpret the hadiths.
So which book would be more exposed to editing and corruption? I think its the Quran.
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