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

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.

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

What did your sister do to you that you can never forget?

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?

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 would happen if Kakashi and Naruto switched places?

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

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

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

What thing happened to you as a child that you haven’t let go of to this day?

THE BIBLE IS THE PROBLEM!

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

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

Why cant I sleep? When I'm about to fall asleep, I get excited that im about to sleep, causing me to wake up again. It repeats till my sleepiness is gone. I tried taking melatonin and not using my phone, but I end upawake for hours.

A belief in a god is not the problem.