Of the seven billion people who reside on planet Earth, only 25% could, in the broadest sense of the word, be classified as "Christian" (and the percentage who have personally trusted in Christ for salvation is much smaller), meaning that over five billion people in the world are destined to hell if indeed Christ offers the exclusive path for salvation. To many people, such a claim is offensive.
Not All Roads Lead to Heaven: Sharing an Exclusive Jesus in an Inclusive World (ed. Baker Books, 2016) - ISBN: 9781493401468