so everyone is going to heaven no matter what they do or believe in this life? obviously there's no way to get that from the bible. The bible is explicitly clear that not everyone is going to be saved.
You mean it's a correct argument based on a wrong interpretation of the bible made by Christians. Atheists are just parsing the standard Christian interpretation as sadistic (if it were true), using their own personally derived concepts of what is and isn't moral ----> which is exactly what you are doing when you decide the standard Christian interpretation has to be wrong.
In your own way you are actually using the same reasoning and making the same argument as atheists do - saying the plan of salvation as described in the bible is, taken at face value, immoral. The only difference is atheists don't feel the need to rewrite the bible as you are doing to rationalize and justify your dogmatic belief in Christianity.