"In Surah 29:46, the Quran commands Muslims to say to Christians, "We believe in what has been sent down to us and what has been sent down to you, and our God and your God is one, and we are all Muslims to Him."
Yet many Muslims say something very different to Christians. They say, "We don't believe in your book, because it's been corrupted and your God is a false god." If Muslims are commanded to say that they believe in what has been revealed to us, why do they instead say that they don't believe in the Bible, the only revelation we have? And if they're commanded to say that our God and their god is one, why do they instead say that our God is a false god?"