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

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

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

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

Why are the people who don't support the LGBT community treated like super evil and cruel beings? People can have different opinions and thoughts on things.

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

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

A belief in a god is not the problem.

How can Democrats not feel hypocritical when they urge Trump not to be vengeful should be become president when the Democrats are trying to put Trump into prison?

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?

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

Do women wear undies under leggings?

THE BIBLE IS THE PROBLEM!

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?

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

What are your thoughts about Hulk Hogan at the Republican National Convention in support of Trump and ripping his shirt off? Did he exaggerate?

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