The Christians need the fear of Hell to get church members to donate. The other groups recognize the importance of financial backing to support their worthy cause.
The belief in God or Hell is brainwashing to elicit a response. The designers of religion must have thought a free thinking person won't donate their resources or time, which is false.
Could religion deny God? Vince McMahon showed us it can with a tax exemption (wrestling admitted it was fake).
Society needs to give religion a carrot to get it to deny God. What is that carrot? They already have a tax break, so I don't know what further incentive there could be.
Stargate SG-1 had an episode where they played footage of Apophis dying to believers. They immediately stopped believing in Apophis because he had died.
Science is showing the movie of Apophis (Yahweh) dying. But, the apologists create so many videos of misinformation to drown it out.
Eventually, truth wins out they say.