The text is funny, but I just thought something. While Cas did call Sam an abomination and the boy with demon blood, I don't think he ever hated Sam. In fact, if he had then he wouldn't have shaken Sam's hand in a such a way he did in this scene. I just think Cas had always had his doubts and even then in this very episode I think Cas's doubts are expressed.
Doctor Who 13th Doctor Thirteenth Doctor Jodie Whittaker << I don't know about anyone else, but I'm really excited about this! This is uncharted territory for Doctor Who. I'm interested to see how this goes.