The thing that's apparent is some theists go out of their way to lie about Atheists and/or Atheism. The question is why? Why lie?
Is it fear?
Do atheists threaten theists in some way?
Is it because atheists cause theists to truly question their own beliefs?
Is it because atheists rely on facts and not faith?
Do theists fear atheists?
Or, if it's not fear, what is the root cause for all the lies?
It is a combination of factors but what it boils down to is influence at a minimum and control in the extreme does not like competition. Not so much fear even if that is shown, but the difficulty in dealing with alternative, question, and reason.
History is overflowing with all of the faults that religion/theism beings to the table.
Bigotry, misogyny, homophobia, social division, social isolation, violence, loss of life, genocide, warfare, and absolute ignorance are the true evils of religion who draws their legitimacy from location and following.
Localized indoctrination gives logic and reason ample room to ask, notice how generally speaking the religion you follow seems to be based on where you are and the majority opinion of the populace at the time?
Legitimacy comes from a volume of followers convinced the ideology and story they are told is true and it also gives logic and reason ample room to ask, notice how the only real difference between cult and accepted beliefs is the number of followers?
The big questions in life are not really answered by religion, they are replied to with a story rooted in certainty where as atheism and agnosticism asks questions rooted in doubt. And that of course challenges whichever set of Bronze Age myths one may cling to, sitting there in judgement of what science learns today and bending that into something written thousands of years ago when no one had any idea what science and systems of process even meant.
Reasonable people with plenty of humanity can come together and instill social order via laws that just about every nation has. Let's not kill each other, steal each other's things, rape, what have you. Religion claims to own those moral standards yet any objective view of history concludes with certainty that systems of belief bring you devolution, the dark ages, and flying a plane into a building. Reason, question, doubt, process, refinement brings you advancement, puts a man on the moon, and allows us to communicate with one another all over the world through a variety of means.
Information and knowledge is freeing, religion is enslaving.
And that brings us back to competition, religion wants control and science wants advancement. They are inherently adversarial, and that promotes the "morals of religion" to frighten their own by lying about atheism and agnosticism.