"I can go investigate how the other planets are doing first but it probably won't take me eight local days and I'm not an especially patient sort."
"I'm not going to attack you, but I very badly want to get this entire mess over with and that means having a conversation."
"Filth creature, by communicating with us against our wishes you are risking contaminating us with a contagion that causes extreme distress often to the point of suicide," says the administrative type. "If it broke loose on this planet, it could destroy what little stability we have been able to maintain. We ask that you stop and give us eight days to construct proper quarantine protocols."
"I don't think that would really take eight days. You could just find a volunteer and launch them into space for me to rendezvous with. I wonder if you're thinking of doing something else."
"Not to mention we are still being routinely attacked by rioters and degenerates," says the administrative type. "Filth creature, if you truly wish to avoid destroying any more planets, go away and come back in eight days."
Cam finds out how long the local day is and tries another planet.
This would be an unqualified disaster if the only players involved were him and this species of alien. But they were mid-third-genocide when he got here. There probably are not exactly four sapient species in this universe. They have to cope or - not cope. If they're not coping now at least they didn't generate another dozen planets' worth of - of art and history and small children to blow up first.
Next -
The one after that, apparently, is the ancient home of a secret cult who have taken the opportunity to seize power and start ritually sacrificing purity-keepers in gruesome ways. Apart from the ritual sacrifice problem, this is actually one of the most stable planets he's seen so far.
"The whole destruction thing is a big misunderstanding," Cam says. "If there is something - not a person, please - which you would like me to destroy as a demonstration that can be arranged, though."
"Your civilization is really stupid and ended itself as soon as another person it couldn't kill came along."