
In 1882, German philosophy Friedrich Nietzsche, student of Arthur Schopenhauer—Germany’s first admitted and inexorable atheist (himself trained by Goethe, promulgator of physical chemical morality theory)—declared “God is dead!”; in 1886, Nietzsche published Beyond Good and Evil: Prelude to a Philosophy of the Future; in 1888, before going insane, he drafted Will to Power, the last pages of which were devoted to figuring out how to replace the defunct theory of god with the newly-arising field of thermodynamics; in 1942, Nietzsche was declared, by Albert Camus, to be the “greatest of god’s assassins.”

In 1882, German philosophy Friedrich Nietzsche, student of Arthur Schopenhauer—Germany’s first admitted and inexorable atheist (himself trained by Goethe, promulgator of physical chemical morality theory)—declared “God is dead!”; in 1886, Nietzsche published Beyond Good and Evil: Prelude to a Philosophy of the Future; in 1888, before going insane, he drafted Will to Power, the last pages of which were devoted to figuring out how to replace the defunct theory of god with the newly-arising field of thermodynamics; in 1942, Nietzsche was declared, by Albert Camus, to be the “greatest of god’s assassins.”

In terminology, god assassin, or “assassin of god”, refers to someone, e.g. Friedrich Nietzsche (said to be the greatest), among famous atheists, trained in the art of anti-theism, able to, metaphorically speaking, assassinate “god”, i.e. to assassinate belief in the existence of god, and related “god talk” or god theory (or god hypothesis) baggage, from the mind of the learned scholar, firstly, and the general populous, secondly; similar to how Einstein in 1905 disabused the notion of 'ether', the medium in which electromagnetic waves were thought to be propagating, from physics.

Goethe | Schopenhauer + Nietzsche
In 1796, German polyintellect Johann Goethe, a Haught disbeliever (#19), after previously working out his own version of evolution, he called metamorphology, began to work out the problem how the “moral symbols” of nature, specifically from physical chemistry, make Christian morality superfluous, null and void, and in fact defunct, as per human relationships and interactions are understood as chemical reactions.

In 1806, Goethe began to interact with and to mentor a then 18-year-old budding philosopher named Arthur Schopenhauer, who would absorb Goethe physicochemical philosophy, into the mold of his own the world as "will" and representation philosophy, and therein became Germany’s first avowed atheist.

In 1868, a then 24-year-old philosopher named Friedrich Nietzsche abandoned his struggle of the Hegel scholars and seized on the writings of Schopenhauer, thereafter becoming his main intellectual “educator”; in 1882, Nietzsche famously declared “god is dead”; in 1888, in his last draft manuscript Will to Power, was working on the problem of how to replace a dead god with thermodynamics.

In 1942, Albert Camus, in his The Myth of Sisyphus, characterized Nietzsche as the most-famous of the assassins of god: [1]

“Nietzsche was the most famous of God’s assassins.”

(add discussion)

References
1. Malieth, Monydit (aka Tonnerre). (2013). The Future Affects the Past: What Destination is Time Rushing To? (pg. 57). Red Lead Books.