How do you know you'll still be you when you get to heaven?

[John V]

You're conflating the two stances, belief and worship. Yes, many atheists worthy of the appellation would, if asked, refuse to bend the knee and kiss the Yahweh arse, purely on the merits (or lack thereof) of the character as presented in the mythology. However, I doubt you'd find many atheists who'd continue to profess non-belief if the character's existence were proven beyond all reasonable doubt. And let's not forget, it's unbelief that is the one unforgivable 'sin', punished by hellfire and damnation and all the other excesses of the febrile mediaeval imagination.

Actually you're conflating belief in the existence of god with salvation. As James, says, the demons believe in the existence of god - and shudder.