Mourning a Sim They've never even met

I also find it out of character for evil Sims. I was recently playing one of my evil Sims while I had aging for NPCs turned on. Three elderly Sims he was acquainted with died every 2-3 days and he got the 2-day very sad moodlet every time. I will admit that in my example he at least knew the Sims but it still bothered me a little. Traits should have more impact on the Sims than emotions, which is really just another symptom of the whole issue that it can feel very similar playing different Sims. The only good thing was that he is also a minor celebrity and had the 'Emotion Bomb' quirk, so he had the meltdown that comes with negative emotions, which makes the moodlet disappear. But evil Sims should not get very sad about a death unless it is really a very close friend, family member or a romantic relationship.
My point is that traits should always affect emotions instead of emotions overriding traits.