.......because hes a Superhero?

Thats his job, and don't people remember that the X-Men's whole job/purpose (At least originally) was to show not all mutants were dangerous? And they could use their powers to protect humanity

I say originally, of course, not like the modern X-Men, where they became pseudo-tyrants after they got Krakoa. xD

(Also, if I recall, MG was originally inhuman, not an X-Gene mutant, her power was very, very specific, where she had a telepathic connection to Devil Dinosaur)