Angels are dogmatic in my story, plague by hierarchy and structure. Christ is the chill down to earth free-lance boss, who handles things his own way. There's a cosmic paradox in there, but I think the classic story also had a few as well.
Now as for thought, a twisted faith is not outrageously unrealistic, because many people skew their priorities. Clarence just took too many wrong routes, made too many bets, and settled against too many loved ones. His life is a tragedy of his own making despite his own chances at happiness. God gave him every possible chance even at the end, when few others did.