Sexuality exists, just like new, fun big words!
This does not really have to do with extentialism, But we atheists view sexuality as a healthy part of an adult's life.
There is no impact. If people don't like people of a different sexuality, it's because that's just how they think, not because they're atheist. There isn't an atheist book about what you should think about heteros/homos/trannys etc.
We are pretty sure it exists.
That life exists.
Atheists have friends like anyone else; existentialism is irrelevant.
It does no such thing ! You may want to read about philosophy to learn what existentialism is.
Atheists believe friends exist.
Families of atheists exist.
As far as I am concerned existentialism plays no part.
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.
Humans have values, secularly as well as religious. Religion need not play a part in human values. Existentialism is moot.