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

A belief in a god is not the problem.

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

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

One of Pop’s Hottest Stars Posted a Risqué Album Cover. All Hell Broke Loose. - Slate Magazine

THE BIBLE IS THE PROBLEM!

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

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

Hillary thinks we must censor or "we lose total control". Why does she demand total control?

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

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

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

What does it mean when a guy says he doesn't want to ruin the friendship? Is he rejecting me or is there another explanation? Why would a guy choose not to risk the friendship if he has feelings for me?

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

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

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.

What are the legal obligations of a new homeowner if the previous owner leaves furniture in the house after moving out?

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?