I'm not here to argue religion with you, just to point out that the opposite of your statement is also true. Just because someone believes something,does not mean it exists. Yes, this is related to the OP's post. As nurses we are required to provide culturally sensitive care. Nurses are part of a team of professionals who revolve around and serve the patient. The patient's needs and belief system are primary. Every person has the right to their religious beliefs, but no person has the right to force their religious beliefs onto a patient who might not share them.
I was raised within a major, non-Christian religion that does not have a concept of heaven and hell. In my religion the dead live on in the memory of those who loved them. That is enough for me. I certainly hope you would not try to convince a member of my religion otherwise as they lay on their death bed. That would be rude and upsetting.
Every single patient deserves sensitive, culturally competent care. Every single patient deserves autonomy and the right to make their own decisions whether or not their nurses support those decisions does not matter a bit. If a patient or family in the ICU chooses a terminal wean, it is not up to any provider to try to influence their decision.