In my world that wouldn't be a problem, I saw Hell more times than anyone would care for. But even if there's no afterlife, it's still the same. He only saw what he was missing out, but he didn't see what you are going to miss out.

I guess it's really hard to get someone with just one life to understand that how it feels to not being able to really die just because of your nature.

[He's not sure about Marco, but he has died before and even tried to stay dead only to be kicked out, only to be rejected even by Hell itself. It's ridiculous, how people want to live forever and don't get it, while he wishes he could just die and remain dead.]

As some here would say "they may return here".