1 I am speaking the truth in Christ—I am not lying; my conscience bears me witness in the Holy Spirit— 2 that I have great sorrow and unceasing anguish in my heart. 3 For I could wish that I myself were accursed and cut off from Christ for the sake of my brothers, my kinsmen according to the flesh.
The ESV study Bible says this about it:
Paul suffers from great anguish because his Jewish kinsmen are unsaved (see also 10:1). Indeed, if it were possible, Paul might almost choose to be accursed (to suffer God's punishment in hell) so that his fellow Jews would be saved (cf. Moses in Ex. 32:30–32). But he knows this would achieve nothing, for none but Christ could be any person's substitute to bear God's wrath.
So let me see if I have this right. Paul would sacrifice himself such that his fellow Jews would be saved but that would be futile because only Jesus can do that. Right? But being that he wrote that in Romans, which was written after Jesus' crucifixion, doesn't that mean... that... Jesus already did that? Or was what Jesus did not as good as what Paul would have done had he been the one sent to be the sacrifice?
You know what I mean?
Why, by human standards, does it seem through this passage and its ESV explanation that what Jesus did was incomplete? Why didn't Jesus sacrifice Himself so that all of us could be saved?
And if He did, why doesn't Paul believe it?