Hi Brad,
 
Thank you for your closing summary paragraph.  I agree that it makes a lot of sense, and I thank you for posting it.
 
Based on the interlinear rendering you offered, it would seem that Jesus would be the one confirming the covenant because it states "...MY sacrifice and drink-offering shall be taken away".  I don't think scripture would be written from Satan's perspective without directly attributing it to him, such as the conversation with Eve in the garden, or the quoting of his intentions, "I will be like the Most High...".  Besides, if the Jews were in the habit of offering sacrifices and drink-offerings to Satan (ignorantly, or otherwise), why would he stop them, right?
 
Thanks again!
 
Julie