I can't say anyone else's imaginary realms really concern me much. If it makes them feel better to think that they're going to beat me at something after we're both dead...eh, let 'em. I'm happy enough with this world that I don't need to make up one for after death.
Those kind of christians only focus on the negative things. They, by themselves, make this world look like a living hell. Whereas non-christians just enjoy and live, and don't go around victimizing and condemning themselves over stupid stuff.