Why do atheists interpret every single question related to God, as a "does God exist" question?

No matter how specific my question is, people bring up things that have nothing to do with the bible. This isn't a forum to debate. If someone has a question pertaining to the Koran, the answer should be based on the Koran. If people ask a question pertaining to the bible, the answer should be based on the bible. Why is every question I ask bombarded with a completely unhelpful, and irrelevant opinion of "God doesn't exist."