Do Christians really think Islam is from the Devil?

That's the weirdest allegation because already you are acknowledging that the Qur'an is not man-made. It's silly to make statements like this. Christians say that just because we don't believe that Jesus was the son of God. That we are evil, so what about the people of other religions? Are they religions of Satan too. Muslims believe that Jesus was the Prophet of God and the Messiah but not the Begotten son, because that would mean Mary is God's wife. And in the Qur'an it talks about Satan in a very negative way. He's the enemy of man. And another thing I hear Jews saying all the time is "Why would God make the Jews believe that God is only one and after 1000 years He introduces the trinity." Despite the fact that Muslims fight with Jews all the time....The relationship between Islam and Judaism is special and close. Both religions claim to arise from the patriarch Abraham, and are therefore considered Abrahamic religions. As fellow monotheists, Muslims view Jews as "people of the book", a term that Jews have subsequently adopted as a way of describing their own connection to the Torah and other holy texts. In turn, many Jews maintain that Muslims adhere to the Seven Laws of Noah. Thus, Judaism views Muslims as righteous people of God. Jews have interacted with Muslims since the 7th century, when Islam originated and spread in the Arabian peninsula, and many aspects of Islam's core values, structure, jurisprudence and practice are based on Judaism. Muslim culture and philosophy have heavily influenced practitioners of Judaism in the Islamic world. It just doesn't make sense.