LUCIFER/LEX
How could his own flesh and blood do this to him? They may not be the closest family, but at the very least they all treated each other with respect. He was content with that, and didn't need anything more from them. He never caused them problems and acted the part of the dutiful son. How could they do this to him? They know about the soul bound between Norah and him, they even praised him saying it was so rare to have such a powerful bond.
No more importantly, they all know what Norah means to him and yet they fed her to the wolf that is his brother.