That's one minister's opinion. There's been quite a lot written on the topic. Here's some lines from some Superman movies. Here's the first one from the original '78 movie.
Jor-el (Superman's dad): They can be a great people, Kal-El, they wish to be. They only lack the light to show the way. For this reason above all, their capacity for good, I have sent them you... my only son.
Here's one from Jor-El again, in Man of Steel: You will give the people an ideal to strive towards. They will race behind you, they will stumble, they will fall. But in time, they will join you in the sun. In time, you will help them accomplish wonders.
You can easily see similarities between this and what Jesus did, leaving an example. Also note the concept that both are 'only sons.'