If Crowley can relate a little too closely to awful things happening to people who work for awful people, he decides that's also best kept to himself. "Sounds like he did deserve it, a bit." Donna can be nice about it, Crowley doesn't have as much empathy, which might be ironic considering he's in a similar position.

Although it's maybe a little different, if this guy was only doing it for power.

He also chooses not to comment on the badness of the week-slash-month. That might invite questions, and he sure as hell doesn't want to talk about any of that.

"Oh, don't say that, you've jinxed us. Some horrible sandworm or what have you is about to eat us." That seems on brand for this place.