Why do atheists like to say "You can't prove a negative", when if i were to tell you "There is no water in this bucket", all i need to do..?

..is show you the bucket has no water in it and the negative has been proven? For normal people reasoning with non-atheist logic, isn't it true that the one making the claim has the burden to provide the evidence. Since an atheist has no evidence for their claim "There is no God", and try to pretend... show more ..is show you the bucket has no water in it and the negative has been proven?

For normal people reasoning with non-atheist logic, isn't it true that the one making the claim has the burden to provide the evidence.

Since an atheist has no evidence for their claim "There is no God", and try to pretend that a negative can't be proven (when it can), isn't it best to do tell them what one of their atheist role models say: "What you assert without evidence can be dismissed without evidence"?

Bonus question: Why do atheists dislike this reasoning?
Update: Why do questions like this make atheists irrational and assertive, as some answers are showing? Is it embarrassment that cause atheists to be this way? Shame? Why do they try so hard to avoid answering the question? Isn't it true their poor logic has been exposed?
15 answers 15