Blue Maniac
Alzheimers sufferer
More or less what Macky said. It's fair to say that many atheists do not even consider the god idea to be a delusion at all, but rather a different interpretation of the same information. There's a common misconception that 'agnostic' is some middle of the road compromise between the two, but it isn't. There are gnostic and agnostic theists, and gnostic and agnostic atheists.
Not all atheists believe that everything in the universe has a scientific explanation. Not all of them even believe in established facts. I'm in an atheist group on Facebook. Among our 14,000+ members we have anti-vaxxers, followers of several varieties of nonsense (eg homeopathy, angels, karma), anti-feminism arseholes, climate change deniers, even the occasional homophobe or Holocaust denier (though they last about four seconds beyond the moment we sniff them out). If we've done our job right, none of these people are theists.
Not all atheists believe that everything in the universe has a scientific explanation. Not all of them even believe in established facts. I'm in an atheist group on Facebook. Among our 14,000+ members we have anti-vaxxers, followers of several varieties of nonsense (eg homeopathy, angels, karma), anti-feminism arseholes, climate change deniers, even the occasional homophobe or Holocaust denier (though they last about four seconds beyond the moment we sniff them out). If we've done our job right, none of these people are theists.