hulk seemed to be the one member of the warbound who cared the least for uniting the planet, and spent a lot of time just looking for people to smash.
there were sixteen million people on genosha who'd been made to suffer for the majority of their lives, who finally escaped prejudice and prosecution into a semi-utopian existence. there were several x-characters who'd put incredible time and effort into preserving genosha, and several more who were directly affected by it. and then it got blown the **** up. it might not be some random planet somewhere, but x-men have had their efforts turned to naught time and again.
it's just a personality thing. i don't like reading stories were the main character is best known for punching things, i guess. just seems like the whole event is scripted to be a big event, not a good story.