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

A belief in a god is not the problem.

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

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

How can I control my daily masturbating habit?

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

THE BIBLE IS THE PROBLEM!

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

Scientists visualize key protein structures linked to immune response and inflammation - Phys.org

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

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?

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

California schools are very liberal. Do you think California schools are teaching students to hate Republican views (views on: God, guns, prayer, secure borders, etc.)?

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

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.

Do women like men who have slept with many women?

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