The fact that it's pretty much Hank vs. Logan. Even in X-Force, it's kinda just "yeah, we know he's an immoral a$$ and would probably kill us all, but we can still work with him".
But, how has no one at some point had Scott, Jean, Warren, and (especially) Bobby confront him, as a group? Scott after all of Hank's moralizing during the Utopia era should be up in his face.