Not as easy as that I'm afraid
Yes, 2 billion, I know. And what makes them all Muslims, and what has sustained the religion for centuries is the Quran. And - unlike Christians and the Bible - Muslims refuse to compromise at all when it comes to the Quran. Won't budge an inch.
Any neutral, parsimonious reading of the Quran leads to some very uncomfortable conclusions. It is a masterwork of "us vs. them" propaganda, drilling into the readers' brains a strong distrust of non-Muslims. And it doesn't matter how Islamic holy men try to spin it, its propagandistic nature pounds this message into its readers.
As long is this book remains unreformed, it will be a source of bad feelings between Muslims and non-Muslims. It is not as simple as "let them live in peace" as long as Muslims insist that their book is perfect.