What does "Jesus died for our sins" mean?

[MineralMan]

6. That's a very good question.

Old Testament Judaism did animal sacrifices to appease their finicky deity. You had to kill a lamb or a kid (goat) or something and roast it on a fire to make a nice smell for the ever carnivorous deity. Heck, sometimes, the deity demanded that a leader sacrifice his son. "Just a joke, Abe," it said, just before the knife came down. "Here's a goat. That's fine."

So, it stands to reason that the deity would send down his "son" to be sacrificed to make up for the sins of humans. Sort of, anyhow, if you're into that blood sacrifice king of state of mind. Symbolism, see, is big in religion.

So, Jesus is Abraham's kid (son), somehow, but this time the kid (son) doesn't get a goat as a substitute offering. But, that's OK, because the deity can revive him three days later. Magic ensues.

Or something like that. It's all tied up in ancient religious practices that even the Jews don't follow any longer in the modern world,

Jesus is the "lamb" or "kid" of God, see. That's all you need to know. Now, please place your money offering in the plate as it passes by. There's a good lad.