I lost relatives to AIDS, a couple of my closest cousins. I lost friends to AIDS, high-school friends who never even made it to their 21st birthdays in the '80s. When it's that close to you, you can't really deny it, and you can't run from it.
Evolutionary naturalism takes the inherent limitations of science and turns them into a devastating philosophical weapon: because science is our only real way of knowing anything, what science cannot know cannot be real.