[azhenfud]

"Putting religion aside for a moment, does anyone believe that this sort of nonsense (from both sides) is productive or logical?"

God gave TWO covanents of forgiveness, one of sacrifice and adherance to the written law, the other of grace and freedom from the fulfilled law. Choose one.

[safisoft]

God gave TWO covanents of forgiveness

Hmm. Jeremiah 31:31-34 pretty much blows supercessionsim out of the water.

"Behold, the days are coming, says HaShem, when I will make a new covenant with the house of Israel and with the house of Judah not according to the covenant that I made with their fathers in the day that I took them by the hand to lead them out of the land of Egypt, My covenant which they broke, though I was a husband to them, says HaShem. But this is the covenant that I will make with the house of Israel after those days, says HaShem: I will put My Torah [Law] in their minds, and write it on their hearts; and I will be their G-d, and they shall be My people."

Only supercessionism can claim that G-d's Law written down would be different from G-d's Law placed in the mind and on the heart. The Torah of HaShem does not change... only the medium... and of course people's whims and fancys. HaShem remains the same from age to age. Explain that one.