1. The absurd "there's no evidence" declaration.
The argument by atheists is valid that there is no objective verifiable evidence of the existence of Gods. This is fundamental to all atheist beliefs
What possible evidence for the existence of Gods could you offer,
2. The pointless "religious myths are fictional" observation.
Not pointless at all. There is no evidence for the myths and supernatural events of the Pentateuch which was not compiled until after 600 BCE. Pretty much ALL atheists believe this,
What justification based on the evidence that the mythical stories and supernatural events of the Pentateuch such as Noah's world flood.
3. The whole "I demand objective physical evidence (proof) even though I have no idea what that would look like or how to verify it even if you gave it to me" idiocy.
The demand for physical evidence is justified for belief from the atheistic perspective, not, proof, because in reality nothing can be proved.
4. The "atheism is the automatic default for profound ignorance" proclamation.
Atheism is not the automatic default. Puzzling statement that you would call silly. Atheism is simply based on the lack of evidence for the existence of Gods, and no evidence of an anthropomorphic Gods
5. The "religion is the root of all evil" red herring.
I do not any atheists that believe this. Yes, belief in the ancient tribal scriptures can be a motivation for 'evil,' such as tribal wars like the Hamas War, Persecution of ethnic cleansing of groups like Jews and LGBP groups, which is factual in history.
There are many other very fallible human causes of evil clearly acknowledged by atheists.
You use of "all" is a fallacy.
This chapter focuses on one of the common fallacies in Western philosophy called 'all or nothing (AON)'.
AON presents a false dilemma by suggesting that there are only two options – either all or nothing – when in fact there are many more options in the middle ground between those two extremes.
6. The "atheism is scientific" gibberish.
By definition religious beliefs like atheism and the various conflicting claims of Theism cannot be falsified by scientific methods. Science is neutral to religious beliefs.
Atheists are by definition Naturists which supports the consistent use of science to justify belief , and scientific methods of science, but for the most part acknowledge that science is neutral to proving any religious belief.,
You basically listed the reasons for atheists beliefs with a smattering of negative adjectives and exaggerations. Strip away all the nonsense and it is not silly at all,