"the word 'Christianity' is already a misunderstanding--in reality there has only been one Christian, and he died on the Cross. The 'Evangel' died on the Cross."

I've been mulling it over for awhile, and I don't agree. Christ was a Jew trying to redirect the way Jews and others were living their lives; Christians were followers of Christ but didn't really become thought of as Christians until after his death. So Jesus was still a Jew. Right? Idk. I want to know what general consensus may be in a group discussion about this theory of Nietzsch's.