Your question: "How can Atheists.. or anyone for that matter.. honestly believe this all happened by random chance ? .. and you can say "we don't believe in random chance" all you want.. but if you deny intelligent design.. then yes, you are essentially saying this happened by random chance.""
The burden of proof is on the person making the claim and in that case it is you, apparently attempting to promote creationism in the guise of intelligent design.
In case you don't know, not all alleged gods are creator gods. See for yourself:
• http://www.godchecker.com/
• https://en.wikipedia.org/wiki/Lists_of_deities
But no gods are favored by atheists because by definition an atheist is someone who does not believe in at least one god in the real world.
You apparently believe that there is or was some creator god, or if not that, some undefined thing that you refer to as intelligence. You can believe anything you want for any reason or for no reason at all. But one thing that you cannot do is convince a reasonable person that your belief must be true solely because someone else does not believe it.
So far that is all you have proposed here.
Yet more just so you know I actually read your post:
" .. and you can say "we don't believe in random chance" all you want.. but if you deny intelligent design.. then yes, you are essentially saying this happened by random chance.
Update: I want to understand Atheism.. but if you deny intelligent design of any kind.. I'd believe in Christianity over what Atheists believe any day. Yes.. even talking snakes, giants and 7 headed beasts, (as much as you like to mock them).. are a more likely possibility than everything all of a sudden just exploding into existence.
Update 2: I am open to God not being "A magic man in the sky". I am open to every religion being false.. but to deny intelligent design or at the very least the existence of a conscious force in the Universe is completely illogical.. and IS believing in random chance.
Update 3: How Atheists believe the Universe came about is about as likely as to have happened as a man impregnating a woman by having his trousers randomly fall down, and he accidentally falls on top of a woman and his penis just happens to perfectly land inside a womans vagina and he ejaculates inside her. Intricacy and complexity is proof enough to suggest the only logical explanation for the universe's existence is intelligent design."
Atheism has nothing to say about creation, or about cosmology, which is the greater topic unless you are referring to only the space around you that you can see as you sit at your computer station. Atheism also has nothing to say about evolution, about science, or about anything other than the alleged existence of one or more gods in the real world. Atheism does not propose to explain anything at all.
Some scientists may be atheists, but atheism is not science and not even related to science. Some people became atheists after learning that scientific investigation of some phenomenon they previously believed to have been caused by a god turned out to have a physical, testable explanation.
Others became atheists for entirely different reasons. For example, some occultists may also be atheists or not, but atheism has nothing to say of occultism. An atheist can--just like you--believe anything he or she wants to believe for any reason or for no reason at all.