In The Fantastic Four and The Silver Surfer, the Silver Surfer has been sent by Galactus to take out Earth but realizes who has been serving is the true enemy. So the Silver Surfer decides to serve what is right.
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The Silver Surfer held nothing back. But here is the thing. Unlike the Silver Surfer, Jesus didn’t sacrifice himself and that was the end of the movie. Jesus rose from the dead vindicating himself and showing that he was truly the son of God.