Humans have values, secularly as well as religious. Religion need not play a part in human values. Existentialism is moot.
It does no such thing ! You may want to read about philosophy to learn what existentialism is.
We are pretty sure it exists.
That life exists.
Atheists have friends like anyone else; existentialism is irrelevant.
Human problems belong to human beings. We have created our own problems, but resist any actions to correct human problems. If I gave a list of solutions we'd be here for 1000 years or more. Existentialism does not play a role.
Families of atheists exist.
Atheists believe friends exist.
As far as I am concerned existentialism plays no part.
By trying to bring people out of the dark ages, to be educated with scientific facts of how we got here, and not rely on some sky-fairy, but rather ourselves. The use of the word existentialism with atheiest is unnecessary.
Jean-Paul Sartre is known as the father of atheistic existentialism. He was a French philosopher, playwright, and novelist who explored themes of freedom, responsibility, and the absence of a higher power in his works.
I am not sure what is meant by Life Domain Family. It may not necessarily have to do with atheism. and nothing with existentialism.
Philosophers like Jean-Paul Sartre and Friedrich Nietzsche offer very different takes on the idea of existentialism. Ultimately, the different types of existentialism rest on the unified idea of examining human existence.