killing his mother, her father and her two brothers,
Maybe the mother and father were young breeders? These aren't children (under 18) dying. They were adults well into reproductive age as they had their own kids. But, I guess living to 45, 60, 70 isn't worth it if you die of ass cancer. Better to die of alzheimers at 90 or congestive heart failure at 55 or something else. What the hell do people think "dying of old age" means? People are going to die someday from some thing. (Unless, of course, you're orionblamblam and have a Secret Plan.)
And if you've been paying attention, the birth rate in the West, including the US, has been falling for years. The population has only been stable because of immigration. When the Muslims move in and take over you just might be an annoying old white guy they'd rather be without. So much for that living forever.
> These aren't children (under 18) dying.
Correct. But then, if they had been replaced at conception by some other embryo, then chances are quite high that they would have lived much longer than they did.