"Destroy this temple, and I will raise it again in three days."
“No one takes it from me, but I lay it down of my own accord. I have authority to lay it down and authority to take it up again. This command I received from my Father."...............................
John 2:19-22 is figurative speech in comparing his coming death and resurrection to a demolition and reconstruction of a building.
Yes, Jesus is the foretold Messiah the figurative ' chief cornerstone ' but Not a literal cornerstone.
Surely the Jews thought he was speaking of Herod's temple (Mark 14:58) Not the temple of his body - John 2:21
Jesus was resurrected Not in a body made or built with hands like the temple was, but a spirit body (his pre-human heavenly spirit body) which was ' built ' by his Creator, his Father. - Acts of the Apostles 2:24; 1 Peter 3:18 ( spirit ).
Scripture shows who resurrected dead Jesus (Acts 2:27) - Acts of the Apostles 10:40; Romans 8:11; Hebrews 13:20