All belief systems have their fair share of moderates and zealots and Atheism is no different. I know Atheists that take the "live and let live" approach to the point that you would perhaps never know of their beliefs unless you pressed them on the matter. Others need no urging of any kind to discover their POV and still others take every opportunity to make certain there is no doubt in your mind where they stand and how wrong you are if you believe differently (Dawkins).

The point I'm not completely clear on is the idea that there MUST not be a God. Not "the evidence (or lack thereof) seems to show that there is no God" but "I forbid you to believe in a God to save you from your own stupidity!"
I know of the long history, both ancient and recent of despicable acts perpetrated by humans in the name of God however I am also of the belief that those humans chose to perpetrate those acts on their own and generally justify what they've done by evoking the name of a deity be it Odin, Zeus or George Lucas. "The Devil made me do it" and so on. I tend to believe that God (whatever that means to you) and a man made religion are two separate things. That of course is only my own personal opinion.
I also understand the opposition to obstructionist religions who influence legislation however I'm guessing the members of those groups would probably vote similarly whether they believed in God, a Spaghetti Monster or nothing at all. Which is also an unsubstantiated opinion of mine based on impressions not hard facts.
Aside from the religion angle, what is the problem with believing in a profoundly higher life form that is capable of forming universes? Why does that belief seem to be such an issue? If you follow some of the more speculative physical cosmological theories about "branes" and multiple universes you might be able to imagine a powerful extra-dimensional entity experimenting with forming or influencing the formation of universes for kicks. Imagine the closing scene of the first Men In Black film for a visual reference which is just one of an unlimited number of possibilities that fulfill the idea of God within a sudo-scientific framework.

I once posted on this site the question "Would it change your belief in God if it could be proved scientifically that there is an afterlife?" I've asked that question in different ways in different places and received some very strong responses. "Of course not! Whether there is an afterlife or not there is no God!" That reaction always surprised me. There isn't a shred of contrition in the statement. It implies that no matter what evidence is presented there MUST not be a God as if the very notion of it is painful to entertain.
That's the part I don't quite understand. Where does that adamantine position come from? Why is the existence of a higher power so distasteful? Not every Atheist was a former alter boy that was abused by a priest or a nun so most of these positions come from a different source than a personal distaste of religion.
I know with certainty that there are those believers who would maintain their faith unequivocally, no matter the evidence presented so its not a unique position to be sure but defending something is quite a different thing than defending the absence of something. At least that sounds clever when I write it. There may be no difference at all.
Honestly I think all of this comes down to belief systems that are extremely personal and subjective and the psychology of what drives individuals to become polemicists on both sides of the debate is far beyond my limited education and understanding.
Perhaps it is the presence of similar topics in this forum or the proximity of the approaching holiday season that has brought some of these ideas and observations to the surface. I rarely if ever post topics to the Close so I'm not quite sure what the motivation is.
The truth is God is everywhere. I hear his name shouted dozens of times by frustrated drivers while I'm battling my way through traffic every single day.