"You know, except for the times I tried to write textbooks for them."
Even in ancient times, Christian scholars didn't buy that bunk. Take St. Augustine of Hippo, who was extremely clear that no one should view the Book of Genesis as a documentary. St. Augustine, it should be mentioned, lived in the 5th century. For centuries, it was understood that the Genesis was an allegory: The "days" of creation weren't actual 24-hour periods, but metaphors for a really long time, which in the eyes of an eternal, omnipotent, time-transcendent God just seemed like an average work week. That's not just the stance of one surprisingly progressive Hippo; this very view was and remains the Vatican's (and therefore the Catholic Church's) official stance on the subject.
Islam is pretty clear about a few things: There is one God, Muhammad is his prophet, and this is absolutely not up for debate. Obviously, Muslims don't worship Jesus as their messiah. That would essentially make them Christians, and we're fairly sure that Muslims aren't Christians. Otherwise, why would they be called Muslims? Airtight logic right there.
There totally is a messiah in Islam. You might have heard of him, he's a dude called Jesus -- or rather, Isa, as he's known in the Quran.
"Everyone can call me Wank Spanksoff if it gets you all to stop killing each other."
Muhammad was never the only prophet in Islam; he just happened to be the last guy (chronologically) Allah picked for the team, so his was the name that stuck. You might know some of his colleagues, of which he has plenty: Adam, Abraham, Noah, David, Moses, John the Baptist, and, of course, Isa. Isa-Jesus is Islam's al-Masih, messiah, as God personally made him to be the final prophet to the children of Israel. Sure, there are a few differences in how Islam depicts Big J, as opposed to his gig in the Bible: Isa is emphatically not either God himself or his son. However, in exchange for loss of divinity, the Quran gives the guy a sweet set of superpowers Christian Jesus can only dream about.