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

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.

A belief in a god is not the problem.

I have been married for 34 years, and I found out my wife lied, and cheated a lot back before we got married. Does she not change, or is it possible she is still a cheater?

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

THE BIBLE IS THE PROBLEM!

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

Why did lobsters evolve bright colors if they are neither poisonous nor venomous?

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

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

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?

How do I seduce my sister? (I am an Indian) I want to have sex with her.?

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?

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

Why cant I add weight to my lifts even though im completing my sets? Every time I try to add more weight I cant even complete one rep.

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