I think his point is that humans are meaningless little things made just to be in the image of "God" and should "get over themselves" since it's all about God and not at all about humanity.
Seemingly, that somehow doesn't apply to having him shut up and stop making it about himself.
Evidently the family had said she had a history, so they would have had to be playing a long game. I suppose they could have been opportunistic about her condition to make a plausible death, but a plausible death to someone no longer involved in any inconvenient cases doesn't help any such cases nor does it "send a message".
Sometimes things just happen.