Now what is interesting about this is that Christians also tell us that Jesus is god, part of the Trinity, the Creator and has existed for all time. That there is really only one god. Now if Jesus has existed for all time and was around when the universe was created, that means he was around when the OT god (who is actually him) made the rules that Jesus would then abolish at a later point.
Now, what makes this really, really interesting is that Christians also maintain that god and gods laws are unchanging.
Matthew 5:17-18 (New International Version)
"Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished."
Now, if Jesus is God, and has been around since he created everything, that means he created the OT laws. Therefore, it is absurd to also claim that he needed to come along later to change or fulfill the laws. He is all knowing and omnipotent. How is it possible that he did not know that the original Covenant would not work for all time? How is it possible that he could not make the original Covenant work for all time?
It is humorous for Christians to try and pretend that Jesus has come along after the fact while maintaining that he was involved with the original creation.