It is religions that make quite extraordinary claims about these invisible superbeings and their role in the creation of everything in the universe and the direction of human development and societies. There is no evidence for these claims, and no evidence anywhere in the 14-billion years of the observable universe that these invisible god superbeings exist, have ever existed, or have ever had any measurable appreciable impact on the progress of anything at all, ever.
When someone makes an extraordinary claim for which no evidence whatsoever can be found, the logical conclusion is that they were making it up and the invisible supermen don't exist.
That's all atheism is. A sober, calm, logical conclusion based entirely on dispassionately reviewing the evidence in support of a fantastical claim, and concluding that despite the proponents of the claim having been around for thousands of years the evidence in favour of it simply doesn't exist at all, therefore the claim must be deemed a false one.
The fact that bead-rattling lunatics find this so dangerous and threatening that they get all hysterical and start lying and attacking and making even more random stuff up for which there is no evidence all over the shop is both amusing and fascinating - yet also disturbing.