For those who believe in God, if you had proof that when you die there is no afterlife and there will only be oblivion, would you still be a believer?
1. I think there ARE those who believe in God but do not believe in an afterlife anyway.
2. There can, just as a btw, never be "proof that when you die there is no afterlife"
3. It's not just a question of "if you had proof that when you die there is no afterlife" it has to be proof whose validity you fully accept.
4. Assuming [a] that the condition in #3 above is satisfied [it IS a proof whose validity you fully accept] and that the question "would you still be a believer?" is asking whether you would still be a believer in God [not an afterlife] then the answer could still be "yes". You could become the kind of believers referred to in #1