A Christianity that excludes is a Christianity that has lost the heart of Jesus, tbh. Jesus wasn’t living it up with the self-righteous religious leaders of his time (and boy, did they resent him for it!) Nah, he was “out there”, teaching the lost, the lonely, and the discarded. He told them that God loved them too – loved them especially – and the religious leaders killed him for it, not realising that they were proving his point. In a way, excluding people because they don’t fit our (traditional, doctrinal or denominational) view of what constitutes a “good Christian” only ever proves the opposite: that everyone belongs in the heart of God.
As Bob Goff says, “Grace draws a circle around everyone and says, ‘You’re in.'”