My only problem with Lionel as Jor-El at this point is the dagger. I mean, he sees the dagger when he enters the barn, he claims to have seen the Kryptonian symbols, and then begins this long speech about fathers giving sons daggers, blah blah blah. If that were Jor-El, he'd know he didn't give Kal-El the dagger, and know that it can't be a good thing. So what's up with Jor-El completely ignoring the portal through which Zod can be released?