I am glad that your friend knows that God said in Isaiah that He gives His glory to no other. Then he said that the Bible says that God gave His Glory to Jesus. This is ample evidence that the Bible is modified. Let me give you a practical example, if I say, I will not give my money to anyone, then someone claims that I gave him my money, then this person is a liar because I said that I will not give my money to anyone. It's the same when God says that He does not give His glory to anyone, then the Bible says that God gave him glory to Jesus, then this is obvious that the Bible is not telling the truth. I can support you with many verses from the Bible that Jesus is nothing, he is only a man like me and you but Christians don't want to wake up.