Well Christ of course. :) He's the true Son of God. Peter (and many others) have been falsely exalted, often above even Christ. Peter didn't die for anyone's sins - Christ did for all.
Its saying Peter will tell Christ. Peter if I recall correctly will be standing at the gates with The Lamb's Book of Life, welcoming people into Heaven. So its Peter saying to God that its just another who's already served in Hell.
like nazis i guess