I have a theory (based on the Bible) that after we die, Christ will appear to everyone, much as he did when he descended into hades to preach to the captives before his resurrection. Christ will preach the gospel and reveal his person in its full glory, and each person will get to decide at that time based on clear and true knowledge. I base this on Romans, that God reveals himself to everyone. If a person hasn't heard the gospel preached correctly and encountered the Spirit of Christ in it, then they have an excuse. Only when hearing the gospel correctly and encountering Christ, and then rejecting him; only then are they without excuse.