I'm not saying that if Muhammad hadn't affirmed the Bible, I would be a Muslim, but I am saying that in doing so in the Qur’an, Muhammad made it 100% impossible for any logical person to become, or remain, a Muslim.
In Qur’an 5:46-47; 5:68 and 10:94, Muhammad affirms that the Torah and the Gospel (so, at minimum, Genesis-Deuteronomy and Matthew-John) are the inspired word of Allah, and that the Qur'an came to confirm these scriptures, which Jews and Christians MUST judge by. Qur'an 6:115 and 18:27 also affirm that no one can change his words. So, if the Bible IS the inspired, preserved and authoritative word of God, Islam is false, because even when Muslims try to twist the Bible, it clearly condemns Muhammad as a false prophet. If, however, the Bible is not the inspired, authoritative word of God, Islam is false, because it affirms false scriptures. Either way, Islam is false, Muhammad was a liar, Allah is a false god and I'm quite happy to avoid staking my eternal destiny on such a contradictory religion.