[No, in a way he's using her. Because there are a handful of Marvel Superheroes that seem to think he's a violent asshole (they're not really wrong but hey). So he's at least making an effort to point out whoever she'd kill would be entirely innocent.]

They're there against their will. Just as you are in theirs.

[He shrugs.]

We have no idea how long this event will last, you could kill them, but they'll only come back in 24 hours or so. You don't know that that will put a stop to anything. It's simply a waste of your time.