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

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

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

THE BIBLE IS THE PROBLEM!

My religion teacher said that there are no atheists because in order to reject God, you must first have a concept of God, and if you have a concept of God, you are not an atheist. In what way is this true, if at all? Why?

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?

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

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

Is it true that most people in Québec are bilingual in French and English? If so, why do they often identify as monolingual?

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

A belief in a god is not the problem.

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

How do I become mentally strong?

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

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.

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

What made Sally Field a standout choice for "Smokey and the Bandit" despite her reputation as a serious actress after "Sybil"?

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