Saint Peter's appeal to those unaffiliated but good-hearted souls who are welcomed into Heaven: "Please tiptoe past this section of God's Kingdom--we're letting them think that they're the only ones up here!".
Where is any of this in the Bible?
As for the last part, the Bible does exclude certain groups from the Kingdom, however we don't know the individuals, and we have cautions against the latter.
''And whoever says, ‘You fool!’ will be liable to the hell of fire.'' (Matthew 5:22) - that is ''nabal'' (as in Psalm 14:1 - this is not our insult) or one who is separated from God. Jesus taught one should not call his brother separated from God, because it is like murder.