This is a contradiction is terms if there ever is one. Atheism by definition is at best is amoral.
The problem in atheism, sentiment is nonsense. In an atheistic framework there is no difference in the death of a human being from a monkey, snake, catfish or a virus. We are nothing more than a subgroup of catarrhines made of nothing more than the meaningless collection of star dust.
Who are we? We find that we live on an insignificant planet of a humdrum star lost in a galaxy tucked away in some forgotten corner of a universe in which there are far more galaxies than people. – Carl Sagan
Have a nice day. Absent of a transcendent personal God, any talk about suffering and evil is just nonsense. A staunch atheist like Jean Paul Sartre is right to consider moral rules as slavery to a bad construct. In the last sentence of his book Being and Nothingness, Sartre writes “all human activities are equivalent”, and “it amounts to the same thing whether one gets drunk alone or is a leader of nations.” Objections like those from atheists are nothing more than a puff of dissipating smoke with
nothing to stand on.
but even more purposeless, more void of meaning, is the world which Science presents for our belief. Amid such a world, if anywhere, our ideals henceforward must find a home. That Man is the product of causes which had no prevision of the end they were achieving; that his origin, his growth, his hopes and fears, his loves and his beliefs, are but the outcome of accidental collocations of atoms; that no fire, no heroism, no intensity of thought and feeling, can preserve an individual life beyond the grave; that all the labours of the ages, all the devotion, all the inspiration, all the noonday brightness of human genius, are destined to extinction in the vast death of the solar system, and that the whole temple of Man’s achievement must inevitably be buried beneath the debris of a universe in ruins — all these things, if not quite beyond dispute, are yet so nearly certain, that no philosophy which rejects them can hope to stand. Only within the scaffolding of these truths, only on the firm foundation of unyielding despair, can the soul’s habitation henceforth be safely built. — A Free Man’s Worship by Bertrand Russell
I give him credit to face the true nature of his maker. Unfortunately, he was wrong about his ability to build any sort of value from this foundation.