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

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

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

THE BIBLE IS THE PROBLEM!

MIT’s Chilling Experiment That Could Prove Gravity Is Quantum - SciTechDaily

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

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 some examples of unofficial acts by presidents?

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

A belief in a god is not the problem.

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

ABC News anchor David Muir reveals how he feels about his 'Daddy' status - Entertainment Weekly

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?

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

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

Vikings are worried about J.J. McCarthy (if you ignore everything they've said) - The Viking Age

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