From Superman is Jewish?: How Comic Book Superheroes Came to Serve Truth, Justice, and the Jewish American Way by Harry Brod:
Strictly speaking, of course, casting the Big Blue Boy Scout as a Christ figure would make him more Jewish, not less. But many Christians forget that very thing.
The film's sub rosa marketing as a Christian blockbuster isn't a surprise. To the extent there was a messianic theme, though, it hurt the movie. Superman does indeed seem to be carrying the sins of Mankind in Superman Returns. This doesn't leave him with much chance to enjoy, or be enjoyable. The 1978 Superman knew enough to get out of Christopher Reeve's way and let him be his charming self, which also jibes with him being Superman. Brandon Routh doesn't get the same opportunity, always having to stick to the margins and deny himself. It's a shame, because the one scene - after an airplane rescue - that allows him a little twinkle shows that he's good at it.
By the time we reached the 2006 Superman Returns film that brought Superman back to the big screen after a long hiatus, Superman's de-Jewification had proceeded so far that he was not only the ultimalte all-American, he was even being claimed as a Christ figure. Another nice Jewish boy was being resurrected as a Christian god. The Warner Brothers/DC Comics publicity machine launched a two-pronged campaign before the film's release, one aimed at the usual action-adventure crowd, and the other aimed at conservative Evangelical Christians and flying under the general cultural radar, specifically positioning Superman Returns as the next Christian blockbuster, hoping to cash in on the trend following The Passion of the Christ and The Chronicles of Narnia.
Strictly speaking, of course, casting the Big Blue Boy Scout as a Christ figure would make him more Jewish, not less. But many Christians forget that very thing.
The film's sub rosa marketing as a Christian blockbuster isn't a surprise. To the extent there was a messianic theme, though, it hurt the movie. Superman does indeed seem to be carrying the sins of Mankind in Superman Returns. This doesn't leave him with much chance to enjoy, or be enjoyable. The 1978 Superman knew enough to get out of Christopher Reeve's way and let him be his charming self, which also jibes with him being Superman. Brandon Routh doesn't get the same opportunity, always having to stick to the margins and deny himself. It's a shame, because the one scene - after an airplane rescue - that allows him a little twinkle shows that he's good at it.