The Bible claims that God loves all the world. Every ethnic group, language group, and nationality; men and women alike; both rich and poor as well as young and old, are welcomed into the family of God. In other words, Christianity is the most inclusive group in the whole world.
But the Bible also says the only way to become a member of this family is by faith in Jesus Christ. In other words, Christianity is definitively exclusive. And while this exclusivity might be offensive to the current postmodern westerner, the fact is that every group and person is exclusive, using boundaries to define who is in the group and who is out. This is unavoidable. But only Christianity manages to maintain its extremely broad level of inclusivity with the same sort of exclusive boundary that all other worldviews have.