Interesting that you describe yourself as a Christian, yet espouse “survival of the fittest” as a way to justify needless deaths of people with allergies. Hmmm.
Unless you're 100 years old - almost ALL deaths are needless and could have been prevented in some way. That's just life. It's hard.
Yes, I'm a Christian, and that gives me the strength to get through each day of this hard & sometimes ugly life here on this earth that GOD created and put me here to live on. I am thankful each and every day for it! This place earth, that GOD lets me live on - is filled with "terrible beauty". Why did GOD create bad things? I don't know, these are mysteries we struggle with here during our brief time on this earth.
I personally feel that you can't know good, until you know what evil is. You can't know light without darkness. You can't know cold without heat. We are put here for a reason, and we need to make the best of it and try hard every day to live as our Creator would wish us to. But I can look at the earth and the creatures we inhabit it with & see that this is the way GOD wishes it to be. It is true, "that which does not kill us, makes us stronger".
Thanks be to GOD.