Is Muhammad an Antichrist According to the Bible?

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According to the Qur’an, the Bible contains prophecies about Muhammad (see Qur’an 7:157; 61:6). Yet, when we open the Bible, we find that Muhammad is condemned as an antichrist (1 John 2:22-23)! Muslims try to ignore this by claiming that the Bible has been corrupted. But if the Bible has been corrupted, why did Muhammad say that we should go to it to find prophecies about him? If the Bible has been corrupted, why does Allah say that no one can change his words (6:115; 18:27)? If the Bible has been corrupted, why does Allah command Jews and Christians to judge by the Torah and the Gospel (5:43-47)?