Dreampanther
We all face the reaper.
Hey man, that's all part of the evil Superalien's plan to take over our world! See, first he saves some people (but did anybody ever investigate that "accident", huh? How do we know he didn't sabotage that helicopter himself?) so we all think he is a hero, sent to "save us".
See, immediately we start depending on him, so he's getting all this power, and we just accept everything he does as fine, because he's 'Superman'. But hey, how about some healthy paranoia here!
Why should we start dpeneding on some flying freak with more muscles than brains to "save us", when we never needed saving before? Where was this 'highly-evolved civilization' when we could have used some help, like in the Dark Ages, huh?
Nah, see Luthor is the only person who sees Superman for what he really is - a terrible, terrible danger, an alien with unknown motives and hidden powers - and Luthor will fight for all humanity against this villain, who is trying to get us all to trust HIM (ha! the alien) rather than one of our own, a well-respected, very succesful and brilliant businessman, who carries the welfare of our planet on his heart more than any alien ever could!
After all, the alien can always just fly off to another planet, but Luthor, like us, is human - Earth is his home, just like it is ours...