I shake my head in wonderment. You are reading into the passage what you want to see. Verse 28 clearly states that it was an angel. Yet you insist on making it about Jesus.
I gotta do it! I looked at several commentaries and I'm not out of line (as a Christian) in thinking that was probably Jesus. I don't think it's odd that they would call him an angel. When Jesus was first seen by some apostles they thought he was ghost so it wouldn't be such a stretch.
Let me ask you another thing while were on the subject...do you see any similarities at all between Abrahams sacrifice of Isaac and the sacrifice of Christ?