Some go as far as saying that the Bible is corrupted or proved to be corrupted because of these.
However, what Muslims fail to take into account is that the Bible is simply being honest with the short comings of men. It doesn't try to sugarcoat and present them as a beautiful victoria sponge cake or whatever can be classified as pretty. It gives us a picture of the saints, despite their devout beliefs and lives, still were flawed and in need of God's grace in order to be holy.
This is not a proof of biblical corruption or slander of the holy people of God, it merely highlights their shortcomings, which is very honest.
One individual named Dailogues, a Muslim, recently asked on Paltalk How Moses could of written Deuteronomy 34 when he died and stated it was a biblical corruption. I pointed out it was Joshua that wrote Moses' death, to which Dailogues said that was proof of biblical corruption.
No that doesn't make any sense. That's not evidence of corruption, because it is a contemporary of Moses, but not just that a successor to Moses that recorded this.
Let me give you an example of finishing someone else's work and it's not corruption.
J R Tolkien, the writer of the acclaimed book series, The Lord of the Rings, wrote a book called the Silmarrilion. The Silmarrilion is essentially a "history book" of the Middle Earth series designed to fill in the gaps (Not perfectly). J R Tolkien never actually finished the book and his son Christopher compiled his Father's works, as well as come up with new material to help it gel together. Does this mean he is guilty of corrupting his Father's work? No.
Joshua completed the book of Deuteronomy and recorded Moses death, but he didn't come up with new material to fill in a gap or come up with new material for better cohesion. All Joshua did, was record what happened. This is not an example of biblically corruption at all.
If someone wrote a biography and then their closest friend (an honest friend before anyone tries to make the arguement that they could of lied) recorded the details of his death, that does not logically mean that the person is corrupting that particular work.
Adding something that is true to a work is not corruption.