Two roadblocks as I see it are religious documents (bible, koran, etc) require devotees to accept the writings literally and when it comes to scientific aspects of past theological events atheistic scientists seem to have stopped asking "what if?"
My opinion is that even though religious texts contain events which defy the science of the time most every event in these texts can be explained in modern scientific terms. To try to do so, however, is both defiance of the literal theologic requirements as well as anachronistic thus in defiance of modern accepted science. Being as how this is a Time Travel forum you have to admit that if time travel existed it would explain just about everything in the religious histories and possibly disprove most religions however time travel doesnt exist, so, well, "what if?"
What if "God" is just an advanced form of life we havent yet discovered? Pretend just for a second there is a life out there somewhere in a total energy-based form. It lives in a version of its own community, is pretty smart and one day it invents these crude little automatons out of the materials laying around in its workshop- bits of carbon, some rudimentary power supply and a simple form of programming with a limited learining algorythm. These new robots are built pretty well, kinda look like the designer but not exactly because the designer doesnt quite know how to duplicate certain things so it shortcuts with less elegant versions of its own physical features. Then, one day, as a bit of a scientific experiment it starts dumping these little drones on planets around its solar system where they adapt to the environment because thats what theyre programmed to do becuase theyre built in their creators image.
Then the designers race blows themselves to bits in stupid wars over unprovable theological differences or arguments about how their currency should be made or spent or saved or what color light their energy emits. Y'know, important shit.
Eventually the little drones become pretty smart themselves and start to build their own crude little automatons out of stuff laying around their own little workshops- bits of carbon, some rudimetary power supplies and limited learining algorythms. Then one day, for the purpose of scientific experiment, they start dumping these little drones on planets around their own solar system where they adapt because thats what theyre programmed to do.
We're printing synthetic organs in labs now. It's only a matter of time before we're building a new species out of whole cloth. Some day we will be some other life forms "god" and we'll probably be long gone by then. I, for one, believe in God but however remote it may be I 'm not sure I really want to find out anything about "him". I'd hate to find out that God is just an older, slightly more advanced version of us making robots in his lab during business hours and speculating about the origins of his own creator in his downtime.
Or worse: reading about what his species version of Kim Kardashian is wearing while on his lunch break.