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

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?

A belief in a god is not the problem.

Why do US military soldiers/officers have a chest full of medal ribbons when they probably haven't been in a combat situation? Are the medals for attendance, good behaviour, or long service perhaps?

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 .

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

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

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

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

How do you stop your balls from sweating?

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

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

THE BIBLE IS THE PROBLEM!

What would happen if the US government told the British government in no uncertain terms all RAF bases with USAF personnel now must follow the Constitution and us law, and if the UK tried to defy this, the US military would directly attack the UK?

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