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

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

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

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

Everyone says the pet population is out of control. Everyone says you MUST spay or neuter your pets. No one wants to talk about how its almost $1,000 to spay or neuter a pet. Why is it so expensive if its so necessary? Animal shelters do it for free.

THE BIBLE IS THE PROBLEM!

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

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.

Is something wrong with my discharge? So, when I masturbate, white discharge comes from my vagina, but it's not stretchy, it's pasty. It doesn't smell and I'm not itchy, so I'm sure it's not a yeast infection. Why is it pasty though?

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?

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

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

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

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

A belief in a god is not the problem.

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