1. they actually do and the enviroment is the thing that removes that idea my proofs are
studies by Dr.Justin Barrett : Cognition, Religion and theology Project
and Dr.Olivera Petrovich who targeted Japanese society (they are well known that they dont believe in a g**) "Belife in g** isnt Taught But develops naturally"
I got this sources from a trustworthy person (his channel is "muslim latern") if u ever wonder
what they have as inmate idea is that there is something superior not that g o d name is ... and his message is ... so they cant all have one religion
2. true they are the de but big names (gen o ci de r s ) are athiests like joseph stalin and Mao Zedong
3. ok universe is way more complexe than those things and sure its made from systems then again who made those "systems" (since they are not conscious they cant suddenly build up and be perfectly calculated to bring universe just by "pure luck" )
4. tbh I thought many would be athiests but still the religion have limits so they cant just go and make fun of PROPHETS (I mean other works)