score:4
First off, this bit of your question:
I take vengeance in this context to mean that God will intercede for a wronged person and give the other party their come-up-pance here on earth
I'm sorry, but there is no reason to think that. I'm not saying it's wrong, but you can't assume it because there is nothing in the passage to support it.
The general theme of Romans 12 and Deuteronomy 32 is very much along the lines of "don't take the law into your own hands: rely on God and let him execute his judgement." That's what the phrase means. In particular, in Romans 12, the theme is about the paradoxical behaviour required of Christians. The following verses say,
No, βif your enemies are hungry, feed them; if they are thirsty, give them something to drink; for by doing this you will heap burning coals on their heads.β Do not be overcome by evil, but overcome evil with good.
The point Paul is making is not that vengeance is for the Lord per se, but that it is not for Christians to execute for themselves.
Upvote:-1
I understand why we shouldn't take vengeance--because our judgement would almost certainly be faulty and out of an unloving intent. But it seems like God would be acting on the vengeance in our hearts if he were to do it himself.
1 John 2:2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
Since Jesus paid the price for the sins of the whole world, every sin is in effect against him. He has the legal right to exact revenge if he desires.