A similar example of this in the real world would be a high compassion Slave owner not minding the mistreatment of his slaves or a general massacring a village of "savages" on the basis that they are not real people. I am sure that if you look at human history you can find many famous historical figures known for their high moral standards who also committed horrific atrocities.
Such people are not high Compassion.
Full stop.
Compassion is not a virtue amenable to loopholing or subjectivity. It is a Virtue which grabs you by the mental collar and rubs your nose in the fact that
look at those people there, look at them dying, why aren't you saving them? Why? You could do something and you're not doing something? DO SOMETHING.
Even a Compassion 3 slave owner is, on average, going to constantly running into the rules of their society. You're going to have to suppress your Compassion whenever you see blatant injustices (ie, Diff 1 Compassion checks and at least a third of the Diff 2 checks). Some forms of slavery are more viable than others for a high Compassion slave-owner (for example, a society with short-term indentures as a common thing where the slave still has a lot of rights is more tolerable than the kind of chattel slavery practiced in the US), but human suffering is human suffering from Compassion's PoV.
Even in a chattel slavery society (like, say, the Realm satrapies in the North that use mass chattel slavery for farming), it's
playable as a concept, but you're going to be the kind of slave owner who's the reason why the Romans passed laws on how many slaves you could free and the Americans banned manumission. You probably inherited your slaves and are torn apart by internal conflicts between the laws and standards of how you were raised, and your personal standards of right and wrong. And if you see your men beating your slaves, ping, that's a Compassion check.
(You might well Exalt and go "I NOW HAVE THE POWER TO FUCK SOCIETY AND DO WHAT I THINK IS RIGHT". Or you might not Exalt, and still get killed in the Zenith-led slave rebellion because you were still a slave-holder and the once-slave Zenith has declared that the soil must be watered with the blood of slave-holders rather than slaves)
Same for the general. If you are butchering unarmed "savages", because you can see the children running and screaming and you're watching your men cut down people who can't fight back and
why aren't you stopping this they might be barbarians but that crying child sounds like your little brother and how is this right but you have your orders and and and
For the case of the demonologist banishing newly made demons back to Malfeas, that's probably not going to initially trigger Compassion - as, after all, that's where demons come from, and it's their home... but a demon who protests or argues that they don't want to go and beats their MDV might well have a chance of expanding their knowledge or affecting their feelings enough that they suddenly are caught up with a problem of "... I might be sending them to their death".
Because, after all, a silver-tongued demon can quite possibly manage to argue that sending a serf-demon back to Hell is "Ignoring the pleas of the oppressed or impoverished. Ignoring the powerful abusing the helpless" - as they are oppressed and helpless.
