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

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

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

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?

How did you know you weren't the narc?

THE BIBLE IS THE PROBLEM!

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.

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

Why is (n-1)(n+1)=n^2-1?

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

A belief in a god is not the problem.

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

How do flat Earthers explain the existence of other spherical planets?

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

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?

Is there a stereotype that South Indians are physically strong and muscular compared to other regions of India?

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