Try looking at it that way and see what happens.
I agree. That's why Gods' immutable word said from the very beginning of creation, God ordained that whoever leaves His Light will dwell in darkness. Whoever understands good and evil and handles that knowledge improperly is going to die.
That's what it says and that's all it says.
He meant believers who needed serious schooling. Those early brothers understood the Justice of God. They wanted the judgment of God to fall on their Roman overlords. They also believed their God was merciful.
Their problem was they had no clue how far their Gods' mercy went. They got an education from Jesus that flipped them upside down.
Yes and everyone who is saved must acknowledge his or her sins whether Jew or gentile as Jesus has proven He will forgive any sinner who repents.
Always what the message was. Yes.
No. There's some lesson in everything for everyone. That was Pauls' entire argument concerning the law,