not him particularly
rather him, Zod and his minions, The Army,
The World Engine, etc...
But thats not the point (this is not a argument of if Superman killed people/ criticism of the last movie)
The point is that some people of that world would see him as a menace...
Either if its with
- blaming Superman himself
- blaming Superman for bringing Aliens to the Earth
or just plain fear of Superman (as a Alien monster)
Thus he needs to gain those peoples trust, since Lex would likely harness those people's anger/fear.
thats good to hear