You're not crazy. My ds was obsessed with death around that age and would ask relentless questions about it, nearly always at bed time. Also very hard on himself, also finds it hard to forgive himself, also a deep thinker. I think this kind of deep awareness may be unsettling for us as parents (because we know we can't satisfy with the pat, easy answers), but will come to serve our dc well in life. It's okay to be questioning things. I did as a kid. I used to spend hours trying to imagine what it must be like to live within another body, after tiring myself on the why of it, and now I'm a writer.
