Why does it matter so much to atheists that God doesn't exist?

Because these are not any gods rules we are talking about.

A belief in a god is not the problem.

Notice that I said their rules, not any gods rules.

Have anyone had an relationship of any kind with a spirit or demon, such as a succubus? If so, how was it?

The people of the modern world have evolved past all of that nonsense.

My problem is that people who try to shove their rules down everyone's throats - including by physical force - DO EXIST .

THE BIBLE IS THE PROBLEM!

Is homosexuality an excommunicable offense in Christianity?

IT does not matter, mainly because it does not exist.

I do not personally care if you believe in a god or not.

And then use and ENJOY these fantastic scientific advancements every single day of your life?

What do you think of Hegseth calling The Atlantic journalist Jeffrey Goldberg, "a deceitful and highly discredited so-called journalist who has made a profession of peddling hoaxes” after team Trump texted him their top-secret war plans on Yemen?

I am speaking to the US Bible thumpers here, of course ~ many of whom are flat-earthers who deny evolution and see scientists as evil people who are constantly trying, and succeeding, in disproving their beliefs one by one.

Those rules that you are trying to reinstate are rules made by men who didn't know anything about the earth, nor anything about all of the other inhabitants of it. How can you not see that?

And how do you deny hundreds of years of advancement in all fields of science?

Why is it important for Hollywood celebrities to come out against Trump?

These are man made rules - made thousands of years ago for the use of the humans who lived thousands of years ago.