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

THE BIBLE IS THE PROBLEM!

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

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

Why is the First Amendment referred to as a right to free speech instead of an immunity from punishment for one's words, regardless of their truthfulness?

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

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

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

I want to touch my sister’s boobs. What do I say?

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

A belief in a god is not the problem.

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

Why is the internet so restrictive? Why is it impossible to find a place where you can express yourself fully?

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.

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

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?

What does it mean to live "the 'underconsumption' life"?

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