Scientists and theists agree that there was a beginning though different words are used. One asserts that God did it. Atheists assert it just happened.
You are sort of implying that science is the same as atheism.
Not all scientists are atheists…and not all atheists are scientists.
Scientists are qualified & trained professionals who work it in specific sciences in specific scientific fields. And it is their jobs or careers.
Atheism isn’t science, it is a personal philosophy for each individual. Atheism is philosophical position on the matter of the existence of any deity - people who are atheists either lack of any deity’s existence or they don’t believe in any deity, that’s all there is to atheism - nothing more, nothing less.
Atheists don’t require to be qualified to be “atheist”, and being an atheist isn’t a career or job choice. Being atheists don’t require to study any science, because being atheists are not equivalent to being evolutionary biologists, nor being astrophysicists require knowledge in the Big Bang theory.
Scientists with personal background in atheism, aren’t the only who accept the Big Bang theory, so do scientists who are Christians, Jews, Bahai, Hindus, and other theists. And it is the same with the theory of Evolution…Evolution is clearly not limited to “atheists only”.
Prior to becoming an agnostic in 1870s to his departure, Darwin was still a Christian when he published On Origin in 1859. His friend and fellow naturalist, Thomas Henry Huxley was the who coined Agnosticism in 1869.
Likewise, while Alexander Friedmann and Howard Percy Robertson may have been non-theists, Georges Lemaître was a Roman Catholic priest as well as astrophysicist. They have each, independently formulated the Expanding Universe hypothesis.
But I think you know that already.
You should reword your last paragraph to
“Scientists assert it just happened.” Leave atheists out of the science business.