I think you can guess what they're upset about.
Did I ever mention that angry people sometimes make less than optimal decisions?

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“None of that would’ve been necessary if not for the fucking Manties.” Gervais’s voice was a snarl. “It’s that goddamned loose warhead Gold Peak’s fault. If she weren’t such a maniac, if we hadn’t known she’d be coming for Mesa as soon as she possibly could, we wouldn’t have had to rush Houdini that way and Mom and Dad would be right here on Darius right now.”
A sort of sub-aural growl answered him, but Collin shook his head.
“Gold Peak may be the one who actually pulled the trigger, but it wasn’t just her. It was her whole damned ‘Star Empire’ and their goddamned friends. All of them. Elizabeth, Mayhew, Pritchart . . . and that bitch Harrington.”