How does lex luthor challenge superman morally?

The only verified fact supplied is that Superman is a known entity. No information about Lex Luthor, his actions, or any moral conflict between the two characters is present in the given evidence. Consequently, it is not possible to describe how Lex Luthor might challenge Superman morally. To answer this question accurately, additional reliable sources that detail Lex Luthor’s role and moral stance in relation to Superman would be required.