Absolutely the scariest thing. Obviously I’m not talking about the immediate threat, but I don’t think there’s much doubt that Kylo brought Luke more pain than Vader (I’m talking emotionally here).
Yeah, but what the basis is for that fear, and pain other than the vague concept of “darkness in his heart” is unknown. All we saw was a young boy lying in his bed, which isn’t much at all IMO, considering this:
No, he sees someone who will bring to an end everything and everyone that he spent his entire life building and loving.