Yeah, I was only being half-serious with this part. I just think they should have improved it. It's not like using the Kryptonite spear is an automatic death sentence at this point, all her talk about him giving people hope before and now she seemed to just want him to not do his job. Hmm, I don't know. Alfred says in their first scene 'So the White Portuguese is a Russian? That's the theory?" like they've been discussing it for a while at that point. I think if anything we might be missing a scene somewhere of Bruce finding out about the White Portuguese and looking further into it. His mentioning of it is so abrupt that it feels out of place now.
Well, considering he had passed out from being near it in the time it took him to swim down and get the spear, the extent of the effects on him are pretty apparent to her.
It's perfectly reasonable for her to be concerned he could die if he were to attempt to wield the spear long enough to kill DD. Even if carrying the spear didn't kill him, it would have weakened him enough that DD could easily kill him.
Kinda exactly like what ends up happening.
As for the White Portuguese, and Bruce and Luthor, Luthor had MULTIPLE plans and back up plans going at all times. We see this with him having DD as a back up, should Batman not finish off Superman.
So it makes sense he would already have things ready to go to smuggle the Kryptonite in advance, just in case he was denied by the Senator.
At first I didn't know if we are meant to assume Bruce always knew about the Kryptonite, however upon my second viewing, I caught that it's made clear he knew from the start, and implied he knows the same way that he knows the WP is planning to smuggle something in the first place.
He tells Alfred early in the film it's a dirty bomb they intend to smuggle.
Alfred later makes clear that, not only was this a lie, he KNEW Bruce was lying to him.
If Bruce was able to learn that the WP intended to smuggle a dirty bomb, he would have been able to learn the same about the Kryptonite, and we learn this IS what he did when he explains to Alfred after he confronts him about lying about the dirty bomb.
So, Bruce always knew about the Kryptonite, probably learned in the same investigation that lead him to the WP in the first place, we just don't find out about it til he tells the truth to Alfred.
Back to Luthor, more and more I'm convinced he wanted Bruce to steal it from the start.
The first time we see Bruce and Lex meet, at the party, we learn Lex has been trying to get Bruce to meet him for a while, and he even throws out the line about his R&D being up to all kinds of no good.
He wants Bruce to "partner" with him so that Bruce can learn about the Kryptonite, and ultimately steal it.
Yet another of Lex's multiple back up plans for accomplishing the same thing.